{"id":2407,"date":"2026-05-28T17:25:43","date_gmt":"2026-05-28T11:55:43","guid":{"rendered":"https:\/\/mymockmate.com\/notes\/?p=2407"},"modified":"2026-07-15T17:20:46","modified_gmt":"2026-07-15T11:50:46","slug":"ncert-class-9-science-cell-the-building-block-of-life-complete-solutions","status":"publish","type":"post","link":"https:\/\/mymockmate.com\/notes\/ncert-class-9-science-cell-the-building-block-of-life-complete-solutions\/","title":{"rendered":"NCERT Class 9 Science Chapter 2 Cell: The Building Block of Life Complete Solutions"},"content":{"rendered":"<div class=\"mymoc-top mymoc-entity-placement\" id=\"mymoc-5076863\"><div id=\"mymoc-1217637961\"><a href=\"https:\/\/amzn.to\/4upqwUD\" aria-label=\"laptop-1\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/laptop-1.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/laptop-1.png 1303w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/laptop-1-300x91.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/laptop-1-1024x310.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/laptop-1-768x233.png 768w\" sizes=\"(max-width: 1303px) 100vw, 1303px\" width=\"1303\" height=\"395\"><\/a><\/div><\/div><div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2407?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\">11<\/span><\/div>\n<h1 class=\"wp-block-heading\">Short Intro<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Cells are the fundamental units of life that perform all essential activities in living organisms. This chapter explains the discovery of cells, structure and functions of cell organelles, types of cells, osmosis, diffusion, mitosis, meiosis, and cell theory. These detailed solutions help students understand concepts easily with step-by-step explanations.<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">Quick Information Box<\/h1>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Topic<\/th><th>Details<\/th><\/tr><\/thead><tbody><tr><td>Chapter Name<\/td><td>Cell: The Building Block of Life<\/td><\/tr><tr><td>Subject<\/td><td>Science<\/td><\/tr><tr><td>Grade<\/td><td>9<\/td><\/tr><tr><td>Chapter Number<\/td><td>2<\/td><\/tr><tr><td>Main Focus<\/td><td>Cell Structure and Functions<\/td><\/tr><tr><td>Important Topics<\/td><td>Cell Organelles, Osmosis, Cell Division<\/td><\/tr><tr><td>Difficulty Level<\/td><td>Moderate<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Concepts Used (Topics Covered)<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Discovery of Cells<\/li>\n\n\n\n<li>Microscope and Cell Observation<\/li>\n\n\n\n<li>Cell Membrane and Cell Wall<\/li>\n\n\n\n<li>Diffusion and Osmosis<\/li>\n\n\n\n<li>Prokaryotic and Eukaryotic Cells<\/li>\n\n\n\n<li>Cell Organelles and Their Functions<\/li>\n\n\n\n<li>Plant Cell vs Animal Cell<\/li>\n\n\n\n<li>Mitosis and Meiosis<\/li>\n\n\n\n<li>Cell Theory<\/li>\n\n\n\n<li>Cell Division and Growth<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Important Formulas<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Cell Size Estimation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mtext>Cell&nbsp;Size<\/mtext><mo>=<\/mo><mfrac><mtext>Diameter&nbsp;of&nbsp;Field&nbsp;of&nbsp;View<\/mtext><mtext>Number&nbsp;of&nbsp;Cells<\/mtext><\/mfrac><\/mrow><annotation encoding=\"application\/x-tex\">\\text{Cell Size}=\\frac{\\text{Diameter of Field of View}}{\\text{Number of Cells}}<\/annotation><\/semantics><\/math><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Magnification Formula<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mtext>Total&nbsp;Magnification<\/mtext><mo>=<\/mo><mtext>Eyepiece&nbsp;Power<\/mtext><mo>&times;<\/mo><mtext>Objective&nbsp;Lens&nbsp;Power<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">\\text{Total Magnification}=\\text{Eyepiece Power}\\times\\text{Objective Lens Power}<\/annotation><\/semantics><\/math><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Osmosis Concept<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><math xmlns=\"http:\/\/www.w3.org\/1998\/Math\/MathML\"><semantics><mrow><mtext>Water&nbsp;moves&nbsp;from&nbsp;dilute&nbsp;solution&nbsp;to&nbsp;concentrated&nbsp;solution&nbsp;through&nbsp;a&nbsp;selectively&nbsp;permeable&nbsp;membrane<\/mtext><\/mrow><annotation encoding=\"application\/x-tex\">\\text{Water moves from dilute solution to concentrated solution through a selectively permeable membrane}<\/annotation><\/semantics><\/math>Water&nbsp;moves&nbsp;from&nbsp;dilute&nbsp;solution&nbsp;to&nbsp;concentrated&nbsp;solution&nbsp;through&nbsp;a&nbsp;selectively&nbsp;permeable&nbsp;membrane<\/p>\n\n\n\n<h1 class=\"wp-block-heading has-vivid-red-color has-text-color has-link-color wp-elements-21db2346f98481c6f03055388ee11b19\">? Think It Over<\/h1>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Q. 1 Where does a cell come from?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1024\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-149-1024x1024.png\" alt=\"image\" class=\"wp-image-3498\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-149-1024x1024.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-149-300x300.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-149-150x150.png 150w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-149-768x768.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-149.png 1254w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Q. 2 How have technological interventions facilitated the creation of new knowledge in understanding the world beyond the naked eye?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-150-1024x683.png\" alt=\"image\" class=\"wp-image-3499\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-150-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-150-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-150-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-150.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-9-maths-exercise-1-1-solutions-coordinate-geometry-ncert-solutions\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 9 Maths Exercise 1.1 Solutions | Coordinate Geometry NCERT Solutions<\/span><\/a><\/div><p class=\"has-medium-font-size wp-block-paragraph\"><strong>Q. 3 How is the cell structural and functional unit of life?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"936\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-151-936x1024.png\" alt=\"image\" class=\"wp-image-3500\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-151-936x1024.png 936w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-151-274x300.png 274w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-151-768x840.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-151.png 1199w\" sizes=\"(max-width: 936px) 100vw, 936px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>Q. 4 How does a cell multiply?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"934\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-152-934x1024.png\" alt=\"image\" class=\"wp-image-3501\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-152-934x1024.png 934w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-152-274x300.png 274w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-152-768x842.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-152.png 1198w\" sizes=\"(max-width: 934px) 100vw, 934px\"><\/figure>\n\n\n\n<h1 class=\"wp-block-heading has-vivid-purple-color has-text-color has-link-color wp-elements-e384d84d875d5826b41abe9770b8d701\">Pause and Ponder<\/h1>\n\n\n\n<ol class=\"wp-block-list\">\n<li class=\"has-medium-font-size\"><strong>What argument would you give for the necessity of a cell wall in plants usually fixed in one place versus in animals  usually moving from one place to the other?<\/strong><\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-153-1024x683.png\" alt=\"image\" class=\"wp-image-3502\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-153-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-153-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-153-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-153.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>2. What consequences would you predict for a plant cell if its cell wall were to become as flexible as a cell membrane?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"576\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-154-1024x576.png\" alt=\"image\" class=\"wp-image-3503\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-154-1024x576.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-154-300x169.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-154-768x432.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-154-1536x864.png 1536w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-154.png 1672w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>3. Why is it important to cut the two potato pieces in roughly equal size and measure their initial weight before placing them in different liquids?<\/strong><\/p>\n\n\n\n<ol start=\"3\" class=\"wp-block-list\">\n<li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"944\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-155-1024x944.png\" alt=\"image\" class=\"wp-image-3504\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-155-1024x944.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-155-300x277.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-155-768x708.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-155.png 1306w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>4. Do white flowers contain any pigment? Give reasons.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"944\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-157-1024x944.png\" alt=\"image\" class=\"wp-image-3508\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-157-1024x944.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-157-300x277.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-157-768x708.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-157.png 1306w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>5. Draw a well-labelled schematic diagram of a plant or an animal cell using these clues&thinsp;&mdash;<br>(i) Nucleus appears as a dark and round body inside the cell.<br>(ii) ER spreads like a network of extended nuclear envelope.<br>(iii) Mitochondria and chloroplasts are rod shaped.<br>You may refer to Fig. 2.10.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"389\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-156-1024x389.png\" alt=\"image\" class=\"wp-image-3507\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-156-1024x389.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-156-300x114.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-156-768x292.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-156.png 1076w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"742\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-158-1024x742.png\" alt=\"image\" class=\"wp-image-3509\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-158-1024x742.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-158-300x218.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-158-768x557.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-158.png 1473w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-9-maths-exercise-1-2-solutions-coordinate-geometry-ncert-solutions\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 9 Maths Exercise 1.2 Solutions | Coordinate Geometry NCERT Solutions<\/span><\/a><\/div><p class=\"has-medium-font-size wp-block-paragraph\"><strong>6. Instead of many small ones, why does a cell not have a single giant mitochondrion? How does this relate to the concept of surface  area?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-159-936x1024.png\" alt=\"image\" class=\"wp-image-3510\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-159-936x1024.png 936w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-159-274x300.png 274w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-159-768x840.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-159.png 1199w\" sizes=\"(max-width: 936px) 100vw, 936px\"><\/figure>\n\n\n\n<p class=\"has-medium-font-size wp-block-paragraph\"><strong>7. If the skin cells start dividing by meiosis instead of mitosis, what do you think will happen to a cut on the skin?<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-160-1024x819.png\" alt=\"image\" class=\"wp-image-3511\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-160-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-160-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-160-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-160.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<h1 class=\"wp-block-heading has-luminous-vivid-orange-color has-text-color has-link-color wp-elements-b1cc961dae7914ae4070ea8e718fb2f2\">Revise, Reflect, Refine<\/h1>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">1. Differentiate between the following pairs of terms based on the clues given in parentheses:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">(i) Cell membrane and cell wall (permeability)<br>(ii) RER and SER (structure)<br>(iii) Chloroplasts and chromoplasts (pigments)<\/p><div class=\"mymoc-middle mymoc-entity-placement\" id=\"mymoc-4001199075\"><div id=\"mymoc-1798802419\"><a href=\"https:\/\/amzn.to\/4v5gV6P\" aria-label=\"calculators\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators.png 1302w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-300x99.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-1024x338.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-768x254.png 768w\" sizes=\"(max-width: 1302px) 100vw, 1302px\" width=\"1302\" height=\"430\"><\/a><\/div><\/div>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-162-1024x683.png\" alt=\"image\" class=\"wp-image-3513\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-162-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-162-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-162-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-162.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h1 class=\"wp-block-heading\">2. Two similar animal cells are placed in two different solutions: <\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Cell X is placed in pure water. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cell Y is placed in a concentrated salt solution. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Cells are observed after some time. Cell X swells, and Cell Y shrinks. Which statement provides the correct explanation for the above observations?<\/p>\n\n\n\n<div class=\"internal-linking-related-contents\"><a href=\"https:\/\/mymockmate.com\/notes\/class-9-maths-end-of-chapter-exercise-solutions-coordinate-geometry-ncert-solutions\/\" class=\"template-2\"><span class=\"cta\">Related Topic to Read more<\/span><span class=\"postTitle\">NCERT Class 9 Maths End of Chapter Exercise Solutions | Coordinate Geometry<\/span><\/a><\/div><p class=\"wp-block-paragraph\">(i) Salt molecules moved into Cell Y, causing it to shrink.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(ii) Water moved into Cell X and more water moved out of Cell Y than the salt solution entered in it.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(iii) Water moved into Cell X and moved out of Cell Y through the cell membrane.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">(iv) Solute movement caused osmosis in both cells.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-164-936x1024.png\" alt=\"image\" class=\"wp-image-3515\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-164-936x1024.png 936w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-164-274x300.png 274w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-164-768x840.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-164.png 1199w\" sizes=\"(max-width: 936px) 100vw, 936px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"335\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-163-1024x335.png\" alt=\"image\" class=\"wp-image-3514\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-163-1024x335.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-163-300x98.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-163-768x251.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-163.png 1055w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-166-1024x683.png\" alt=\"image\" class=\"wp-image-3517\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-166-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-166-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-166-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-166.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">4. Which of the following option(s) of the pairs of cell<br>organelles are correctly placed under the given<br>categories?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"830\" height=\"261\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-165.png\" alt=\"image\" class=\"wp-image-3516\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-165.png 830w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-165-300x94.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-165-768x242.png 768w\" sizes=\"(max-width: 830px) 100vw, 830px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-167-1024x683.png\" alt=\"image\" class=\"wp-image-3518\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-167-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-167-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-167-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-167.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">5. Two students, Renu and Rohit, were having a discussion on the plastids. Renu emphasised that all parts of the plants, even roots, contain plastids. However, Rohit did not agree with the statement and told her that plastids are absent in plant roots since the roots are underground<br>and do not need to perform photosynthesis. Who is correct? Justify your answer.<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-168-1024x819.png\" alt=\"image\" class=\"wp-image-3519\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-168-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-168-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-168-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-168.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">6. Mitochondria and chloroplasts are two important organelles in a plant cell. Discuss how these two organelles are structurally and functionally similar to each other, and different from each other.<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-169-1024x683.png\" alt=\"image\" class=\"wp-image-3520\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-169-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-169-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-169-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-169.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">7. Which of the following pairs of cell organelles contains DNA?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">(i) Chloroplasts, Ribosomes<br>(ii) Mitochondria, Nucleus<br>(iii) Golgi bodies, Ribosomes<br>(iv) Nucleus, Lysosomes<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-173-1024x683.png\" alt=\"image\" class=\"wp-image-3524\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-173-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-173-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-173-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-173.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">8. A researcher carried out an experiment in which she took two carrots of similar size. She placed one carrot in plain water and the other carrot in concentrated salt solution (Fig. 2.21). After 24 hours she recorded her<br>observations.<br><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">(i) What hypothesis does she want to test through this experiment?<br>(ii) What would you suggest for the improvement of this experiment?<br>(iii) Why does the carrot in plain water stay stiff and crunchy, but the<br>carrot in concentrated salt solution become rubbery and limp?<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"237\" height=\"292\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-170.png\" alt=\"image\" class=\"wp-image-3521\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-174-1024x683.png\" alt=\"image\" class=\"wp-image-3525\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-174-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-174-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-174-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-174.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">9. Indicate the presence or absence of following structures in bacterial and animal cells:<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"819\" height=\"251\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-171.png\" alt=\"image\" class=\"wp-image-3522\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-171.png 819w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-171-300x92.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-171-768x235.png 768w\" sizes=\"(max-width: 819px) 100vw, 819px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-176-1024x683.png\" alt=\"image\" class=\"wp-image-3527\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-176-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-176-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-176-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-176.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">10. Carry out the following experiment: Take four peeled potato halves and scoop each one out to make potato cups. One of these potato cups should be made from a boiled potato. Place each of the potato cups in a beaker containing water (Fig. 2.22). Now, set up the experiment as follows:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">(a) Keep Cup A empty.<br>(b) Add one teaspoon sugar in Cup B.<br>(c) Add one teaspoon salt in Cup C.<br>(d) Add one teaspoon sugar in the boiled potato in Cup <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D. Observe the four potato cups at least two hours and answer the following questions:<br>(i) Explain why water gathers in the hollowed portion of Cup B and Cup C.<br>(ii) Why is Cup A necessary for this experiment?<br>(iii) Explain why water does not gather in the hollowed portions of Cups A and D.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"237\" height=\"459\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-175.png\" alt=\"image\" class=\"wp-image-3526\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-175.png 237w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-175-155x300.png 155w\" sizes=\"(max-width: 237px) 100vw, 237px\"><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-177-1024x819.png\" alt=\"image\" class=\"wp-image-3528\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-177-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-177-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-177-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-177.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">11. Identify the pair that incorrectly matches the cell organelle with its function.<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">(i) Ribosome &mdash; Protein synthesis<br>(ii) SER &mdash; Lipid and cellulose synthesis<br>(iii) Lysosome &mdash; Digestion of foreign agents<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-178-1024x683.png\" alt=\"image\" class=\"wp-image-3529\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-178-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-178-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-178-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-178.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">12. What outcome do you expect, if all the mitochondria are removed from<br>a eukaryotic cell?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"819\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-179-1024x819.png\" alt=\"image\" class=\"wp-image-3530\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-179-1024x819.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-179-300x240.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-179-768x615.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-179.png 1402w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">13. Which phenomenon inhibits the formation of tumors in the human<br>body? Can plants also develop tumors? Explain.<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"683\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-180-1024x683.png\" alt=\"image\" class=\"wp-image-3532\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-180-1024x683.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-180-300x200.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-180-768x512.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-180.png 1536w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">14. The cell membrane of a cell is made up of proteins and lipids. Which<br>cell organelles help in the synthesis of cell membrane? Write the path of<br>these compounds from their site of synthesis to the cell membrane and<br>show this through a labelled diagram.<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"936\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-181-936x1024.png\" alt=\"image\" class=\"wp-image-3534\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-181-936x1024.png 936w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-181-274x300.png 274w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-181-768x840.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-181.png 1199w\" sizes=\"(max-width: 936px) 100vw, 936px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">15. What would happen if gametes are formed by mitotic divisions?<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"603\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-183-1024x603.png\" alt=\"image\" class=\"wp-image-3536\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-183-1024x603.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-183-300x177.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-183-768x452.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-183-1536x904.png 1536w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-183.png 1635w\" sizes=\"(max-width: 1024px) 100vw, 1024px\"><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">16. A farmer, Deepa, was very happy with the harvest of amla (Indian<br>Gooseberry) and lemons on her farm. However, she could sell only one<br>fourth of the produce in the local market. Recognising that a significant<br>amount of produce may be lost post-harvest, she employed a traditional<br>yet scientifically sound method to extend the shelf life of amla and<br>lemons. She turned perishable produce into profitable products, such<br>as pickles and sharbat. She used the excess produce to prepare pickles,<br>murabbas, and sharbat by adding appropriate amounts of salt, sugar,<br>or jaggery to small pieces of fruit and their juices. These were then<br>stored in small glass bottles for sale, helping her prevent the wastage<br>of post-harvest produce. This shift from farming to agro-processing<br>would strengthen food security and boost the local economy, creating a<br>sustainable model that cuts waste while increasing her income. Based<br>on the above passage answer the following questions:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">(i) Which scientific concept has the farmer applied in the preservation<br>of the farm produce?<br>(ii) How does the addition of high concentrations of salt and sugar create an environment that prevents the growth of spoilage-causing bacteria and fungi?<br>(iii) Suggest a healthy recipe of this kind for food preservation.<br>(iv) What are the scientific values addressed in this case?<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"961\" height=\"1024\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-184-961x1024.png\" alt=\"image\" class=\"wp-image-3537\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-184-961x1024.png 961w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-184-281x300.png 281w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-184-768x819.png 768w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/image-184.png 1215w\" sizes=\"(max-width: 961px) 100vw, 961px\"><\/figure>\n\n\n\n<h1 class=\"wp-block-heading\">Common Mistakes<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Confusing osmosis with diffusion<\/li>\n\n\n\n<li>Forgetting functions of organelles<\/li>\n\n\n\n<li>Mixing up mitosis and meiosis<\/li>\n\n\n\n<li>Writing incorrect differences between plant and animal cells<\/li>\n\n\n\n<li>Forgetting that mitochondria contain DNA<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Exam Tips<\/h1>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Practice labelled diagrams regularly<\/li>\n\n\n\n<li>Learn organelle functions with keywords<\/li>\n\n\n\n<li>Use tables for comparisons<\/li>\n\n\n\n<li>Revise osmosis experiments carefully<\/li>\n\n\n\n<li>Remember definitions of prokaryotic and eukaryotic cells<\/li>\n<\/ul>\n\n\n\n<h1 class=\"wp-block-heading\">Practice MCQs<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">1. Which organelle is known as the powerhouse of the cell?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Ribosome<br>B. Chloroplast<br>C. Mitochondria<br>D. Golgi Body<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C. Mitochondria<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">2. Osmosis involves movement of:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Salt<br>B. Sugar<br>C. Water<br>D. Proteins<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C. Water<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">3. Which organelle contains chlorophyll?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Mitochondria<br>B. Chloroplast<br>C. Vacuole<br>D. Nucleus<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B. Chloroplast<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">4. Which cell lacks a true nucleus?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Plant Cell<br>B. Animal Cell<br>C. Bacterial Cell<br>D. Fungal Cell<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">C. Bacterial Cell<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\">\n\n\n\n<h2 class=\"wp-block-heading\">5. Mitosis produces:<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A. Four daughter cells<br>B. Two identical daughter cells<br>C. Gametes<br>D. Spores<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">B. Two identical daughter cells<\/p>\n\n\n\n<h1 class=\"wp-block-heading\">FAQ Section<\/h1>\n\n\n\n<h2 class=\"wp-block-heading\">Q1. Why is the cell called the basic unit of life?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Because all living organisms are made up of cells and all life processes occur within cells.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q2. What is osmosis?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Osmosis is the movement of water through a selectively permeable membrane from dilute to concentrated solution.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q3. What is the function of mitochondria?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mitochondria produce ATP energy through cellular respiration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q4. Why do plant cells have a cell wall?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The cell wall provides rigidity, protection, and shape to plant cells.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Q5. What is the difference between mitosis and meiosis?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mitosis forms two identical cells, while meiosis forms four gametes with half chromosome number.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Get more detailed Grade 9 Science notes, MCQs, important questions, and chapter-wise solutions only on <a target=\"_blank\" rel=\"noreferrer noopener\">www.mymockmate.com<\/a> and boost your exam preparation today!<\/p>\n\n\n \n<div data-block=\"gutenkit\/dual-button\" data-post-id=\"2407\" id=\"block-e25b23f7-0b79-4d06-a551-f5266380e691\" class=\"wp-block-gutenkit-dual-button gkit-dual-button-middle-text gkit80e691 gutenkit-block\"><div class=\"gkit-dual-btn-container\"><div class=\"gkit-dual-btn-wrapper\"><a class=\"gkit-dual-btn gkit-dual-btn-first\"><span class=\"gkit-dual-btn-text\">&lt;&lt; Chapter 1<\/span><\/a><span class=\"gkit-dual-btn-middle-text\">Or<\/span><a class=\"gkit-dual-btn gkit-dual-btn-second\"><span class=\"gkit-dual-btn-text\">Chapter 3 &gt;&gt;<\/span><\/a><\/div><\/div><\/div>\n <div class=\"pdfprnt-buttons pdfprnt-buttons-post pdfprnt-top-bottom-right\"><a href=\"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2407?print=print\" class=\"pdfprnt-button pdfprnt-button-print\" target=\"_blank\"><img decoding=\"async\" src=\"https:\/\/mymockmate.com\/notes\/wp-content\/plugins\/pdf-print\/images\/print.png\" alt=\"image_print\" title=\"Print Content\"><span class=\"pdfprnt-button-title pdfprnt-button-print-title\">Print<\/span><\/a> <span class=\"pdfprnt-count-generation\">11<\/span><\/div><div class=\"mymoc-bottom mymoc-entity-placement\" id=\"mymoc-180560802\"><div id=\"mymoc-1798802419\"><a href=\"https:\/\/amzn.to\/4v5gV6P\" aria-label=\"calculators\"><img src=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators.png\" alt=\"\" srcset=\"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators.png 1302w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-300x99.png 300w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-1024x338.png 1024w, https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/06\/calculators-768x254.png 768w\" sizes=\"(max-width: 1302px) 100vw, 1302px\" width=\"1302\" height=\"430\"><\/a><\/div><\/div>","protected":false},"excerpt":{"rendered":"<p> 11 Short Intro Cells are the fundamental units of life that perform all essential activities in living organisms. This chapter explains the discovery of&#8230;<\/p>\n","protected":false},"author":3,"featured_media":2659,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"postBodyCss":"","postBodyMargin":[],"postBodyPadding":[],"postBodyBackground":{"backgroundType":"classic","gradient":""},"footnotes":""},"categories":[4,12],"tags":[],"class_list":["post-2407","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-class-9","category-science"],"featured_image_src":"https:\/\/mymockmate.com\/notes\/wp-content\/uploads\/2026\/05\/NCERT-Class-9-Science-Cell-The-Building-Block-of-Life-Complete-Solutions.png","author_info":{"display_name":"Team Mymockmate (L)","author_link":"https:\/\/mymockmate.com\/notes\/author\/luckp\/"},"_links":{"self":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2407","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/comments?post=2407"}],"version-history":[{"count":6,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2407\/revisions"}],"predecessor-version":[{"id":6708,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/posts\/2407\/revisions\/6708"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media\/2659"}],"wp:attachment":[{"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/media?parent=2407"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/categories?post=2407"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mymockmate.com\/notes\/wp-json\/wp\/v2\/tags?post=2407"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}