It is a highly complex substance, composed of carbon, hydrogen, oxygen, nitrogen and magnesium chloroplasts are mainly contained in the mesophyll cells located between the upper epidermis and the lower epidermis of leaves. Animals derive their food from plants either directly by eating their part, or indirectly by eating the plant-eater. 5. Given below is a schematic diagram to illustrate some aspects of photosynthesis. (Select the most appropriate option in each case), 1. 6. Photosynthesis ICSE Class-10 Concise Selina Biology Solutions Chapter-6. (a) The student wanted to show that sunlight is necessary for photosynthesis. Required fields are marked *. (a) Dip the leaf in boiling water for a minute to kill the cells. Explain briefly the role of the following structures in this process. (h) The tissue that transports manufactured type of starch from leaves to all parts of the plants. Why is it not possible to demonstrate respiration in a green plant kept in sunlight? (c) What alteration (s) will you make in it for obtaining expected result? (2) Respiration is not dependent on light. 1 for their survival. (1) The leaf is boiled in water for a minute to kill the cells. The leaf is placed in warm water to soften it. Solution:-. 10. Answer the questions that follow: (a) Name the physiological process that releases the bubbles of oxygen. This reaction is known as photolysis of water. (b) Before beginning the experiment, the plant was kept in dark in order to destarch it, i.e. Photosynthesis | Importance of Photosynthesis | ICSE Class 10 Biology Chapter 6 | Selina Concise Solution | Umang 2020 | #Vedantu9thand10thEnglish with (e) The starting point of carbon cycle is the release of carbon dioxide by animals during respiration. Photosynthesis: This module focuses on mechanism of photosynthesis. (c) If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesise in bright sunshine. State any four differences between photosynthesis and respiration. It takes place in the thylakoid membranes of the chloroplast and includes photosynthetic pigments arranged into two light-harvesting complexes within photo system I … In a sense, even this oxygen is not a waste, because all organisms require it for their existence including the plants which require it at night. Share your Results: Facebook Twitter Google+ VK. Select your board, class and subject to Get Started: Select board . Solution:-. (b) Will it work satisfactorily? (b) The kind of plastids found in the mesophyll cells of the leaf. (b) Cuticle is transparent and waterproof to allow light to enter freely. It is not possible to demonstrate respiration in green plants kept in sunlight because during day time plants are undergoing photosynthesis. ATP (Adenosine triphosphate) stores energy in the cells. The male hormone produced by the interstitial cells. 4. The potted plant was kept in the dark for 24 hours. Correct Statement: Green plants are producers. ICSE Class 10 Biology Important Questions 1. The leaf now becomes hard and brittle. The leaf now becomes hard and brittle. It is next boiled in methylated spirit to remove chlorophyll. (a) The candidate dipped the leaf in boiling water for a minute to kill the cells. The grass is eaten up by the grasshopper. (a) What aspect of photosynthesis was being tested? Excellent. No living being can remain alive without oxygen. The pigment chlorophyll is contained in the walls of thylakoids. (a) The rate of photosynthesis continues to rise as long as the intensity of light rises. The correct order in a logical sequence with regard to photosynthesis be. (g) The part of chloroplast where the dark reaction of photosynthesis takes place. (d) Destarching of the leaves of a potted plant can occur only at night. If the rate of respiration becomes more than the rate of photosynthesis, plants will: (a) continue to live, but will not be able to store food, (c) grow more vigorously because more energy will be available, (d) stop growing and die gradually of starvation. Solution:-, (c) Producers and consumers (mode of nutrition) The leaf becomes hard and brittle. The atmospheric temperature is an important external factor affecting photosynthesis. 9. Solution:-, (e) Green plants are consumers. Solution:-. The gas released during respiration is carbon dioxide. Good. (c) What alteration(s) will you make in it for obtaining expected result? (b) The kind of plastids found in the mesophyll cells of the leaf. 4. It prepare its own food by photosynthesis. (3) solution in added. A series of chemical reactions occur in very quick succession, initiated by light and therefore, the phase is called the photochemical phase. It is next boiled in methylated spirit to remove chlorophyll. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Plants prepare food through Calvin cycle using energy synthesized during light reaction. (b) Cuticle They are present mainly in the mesophyll cells and in the guard cells of stomata. Given below is a schematic diagram to illustrate some aspects of photosynthesis. Solution:-. Photosynthesis 10th Science ICSE Chapter 31 Marketing along with videos,solved papers and worksheets.These are helpful for students in doing homework or preparing for the exams Are the following statements true or false? Hence, it is difficult to demonstrate respiration as these two processes occur simultaneously. (g) Photosynthesis stops at a temperature of about 35oC. The main function of the stomata is to let in CO2 from the atmosphere for photosynthesis. Describe the main chemical changes which occur during photosynthesis in: This layer is thicker on the upper surface than the lower one. (a) Guard cells: They regulate the opening and closing of stomata and thus regulate the entry of carbon dioxide through the stomata. These ICSE Class 10 Biology Chapter 6 Photosynthesis Revision Notes will definitely help students to save a lot of time during their examinations. (2) Splitting of water – The absorbed energy is used in splitting the water molecule into hydrogen and oxygen, releasing energy. (c) What is the purpose of keeping a snail in test-tube B? Complete the following by filling the blanks 1 to 5 with appropriate words/ terms/ phrases: To test the leaf for starch, the leaf is boiled in water to …………… (1). Give reason in support of your answer. Step 1:- Activation of chlorophyll. This matter comes from dead animals and plants. Grass is a producer. The region, which contains starch, turns (4) ……………. With four organisms 1 – 4. It is contained in microscopic cell organelles called chloroplasts. Author Rating. ICSE Class 10 Biology 2018 Question Paper Class 10 Biology You have to attempt all questions from Section I and any four questions from Section II. d. Describe step by step, how the candidate proceeded to test the leaf for the presence of starch? (f) Chemical equation for photosynthesis: Return to Concise Selina ICSE Biology Class-10, Heat and Energy Concise Class-9 ICSE Physics Selina Publishers, Excretory System ICSE Class-10 Concise Selina Biology Solutions, ICSE History and Civics 2020 Paper Solved Class-10 Previous Year…, Work and Energy HC Verma Que for Short Ans Solutions Ch-8 Vol-1, HC Verma Solutions Vol-2 Concept of Physics Bharti Bhawan Publishers, ICSE English-2 Literature 2020 Paper Solved Class-10 Previous Year…, Heat and Temperature Obj-2 HC Verma Solutions Vol-2 Chapter-23, ICSE Commercial Studies 2020 Solved Paper Previous Year Question, Privancy Policy | Sitemap | About US | Contact US, Photosynthesis ICSE Class-10 Concise Selina Biology. Available here are Chapter 5 - Transpiration Exercises Questions with Solutions and detail explanation for your practice before the examination (a) Guard cells are cells surrounding each stoma. Chlorophyll is the green pigment present in cell organelles called chloroplasts. Phloem is the tissue that transports manufactured type of starch from leaves to all parts of the plants. Ordinarily, there may be 40-50 chloroplasts in a cell. (c) During the starch test, why was the leaf. Extramarks, an e-learning website offers online tutorials for ICSE class 10 Photosynthesis & its Significance Chapter. The initiation of photosynthesis takes place when the chlorophyll molecule traps the light energy. The dark reaction of photosynthesis is known as Calvin cycle. 13. As mentioned in the above answer, the plant in test tube B has more concentration of CO2 available because the snail releases CO2 during respiration. Yes, we have to take a step before starting the experiment. Solution:-, (i) Green plants perform photosynthesis. (b) Why was the plant placed in the dark before beginning the experiment? 6. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. In the dark reaction, ATP and NADPH molecules (produced during light reaction) are used to produce glucose (C6H12O6) from carbon dioxide. 3. The absorbed energy is used in splitting the water molecule (H2O) into its two components (Hydrogen and Oxygen) and releasing electrons. (c) Starch produced in a leaf remains stored in it for 2-3 weeks before it is used by other parts of the plant. Animals are heterotrophic (different nutrition). (b) What phenomenon do the thick arrows A and B indicate? The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because, (a) starch is immediate product of photosynthesis, (b) glucose formed in photosynthesis soon gets converted into starch, The number of water molecules required in the chemical reactions to produce one molecule of glucose during photosynthesis is, The rate of photosynthesis is not affected by, (a) breaking down water into hydrogen and oxygen. (b) The chemical substance used to test the presence of starch in the cell of a leaf is…………… (CaCl2, iodine solution, Benedict solution). (c) What is the purpose of keeping a snail in test-tube B? The rate of photosynthesis is not affected by, a) breaking down water into hydrogen and oxygen. Given below are five terms. 5. The leaf now becomes hard and brittle. Rewrite the terms in the correct order so as to be in logical sequence with regard to photosynthesis: (i) water molecules, (ii) oxygen, (iii) grana, (iv) hydrogen and hydroxyl ions, (v) photons. Rewrite the terms in the correct order so as to be in logical sequence with regard to photosynthesis: (i) water molecules, (ii) oxygen, (iii) grana, (iv) hydrogen and hydroxyl ions, (v) photons. Hydrogen and oxygen are produced here, along with release of electrons, which converts ADP into ATP. (2) Boil the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. A basic understanding of Meiosis as a reduction division (stages not required). Why is it not possible to demonstrate respiration in a green plant kept in sunlight? If a green plant is kept in bright light, it tends to use up all the CO2 produced during respiration, for photosynthesis. (c) During the starch test, why was the leaf, (1) boiled in water (2) boiled in methylated spirit. The starting point of any food chain is always a plant. He took a potted plant and kept in the dark for over 24 hours. A plant used for experiments on photosynthesis should initially be placed in the dark for 24 to 48 hours to destarch the leaves. The region, which contains starch, turns blue-black colour and the region, which does not contain starch, turns brown colour. Photosynthesis occurs in plants and some bacteria. Ice cold water will hamper the process of photosynthesis in the immersed leaf, even if there is sufficient sunshine. Oxygen is used up and carbon dioxide is released. Free PDF download of Class 10 Biology Chapter 6 - Photosynthesis: Provider of Food for All Revision Notes & Short Key-notes prepared by our expert Biology teachers as per CISCE guidelines. (a) The category of organisms that prepare their own food from basic raw materials. Processes of photosynthesis-; 1)Light reaction: It takes place only in presence of light and occurs in grana region of plastids. The leaves will not show the presence of starch. (2) Photosynthesis is dependent on light. Are the following statements true or false? (d) Before starting the experiment, it is necessary to destarch the leaves of the plant by keeping the plant in complete darkness for 48 hours. (d) A plant and a snail are kept in test tube B. Green grass being a producer is capable of producing its own food by photosynthesis. 1 Mark Questions Answer : Lenticels help in facilitating the process of transpiration in woody plants. (e) Phloem tissue in Leaf Veins Ice cold water will hamper the process of photosynthesis in the immersed leaf, even if there is sufficient sunshine because the temperature is an important factor for the rate of photosynthesis. d. The gas released by green plants during photosynthesis. Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? In the flowering plants, food is transported in the form of Sucrose. Solution:-, (c) Starch produced in a leaf remains stored in it for 2-3 weeks before it is used by other parts of the plant. (f) Photosynthesis results in loss of dry weight of the plants. (d) Why does test-tube B have more bubbles of oxygen? (e) In the flowering plants, food is transported in the form of……………………… (sucrose, glucose, starch). Given below is the diagram of an experimental set-up: (a) What is objective of this experiment? ICSE Solutions for Class 10 Biology – Photosynthesis ICSE SolutionsSelina ICSE Solutions APlusTopper.com provides ICSE Solutions for Class 10 Biology Chapter 5 Photosynthesis for ICSE … (a) Fill up the gaps, in blank spaces (1-4), by writing the names of the correct items. Respiration occurs in all living organisms. A leaf without starch will show brown colouration. During day time, when sunlight falls on the leaf, the light energy is trapped by the chlorophyll of the upper layers of mesophyll, especially the palisade cells. Name the following: a. 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