A perfect student guide for Biology that incorporates Notes, MCQ, FIll in the blanks, short Q&As, and other relevant objective type questions for all chapters in the Biology textbook as per the latest Class 10 ICSE Board Exam syllabus with solutions.. A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to distarch the leaves. Answer : Odd term : Phagocytosis. (d) Xylem Tissue in the Leaf Veins: Water is essential for photosynthesis to occur. We know that temperature is an important factor for the rate of photosynthesis. Give reason. Test-tube B contains both a green water plant and a snail. ICSE Class 10 Biology solutions for chapter-6 Photosynthesis. they are able to produce their own food from basic raw materials. This matter comes from dead animals and plants, which in their own turn were dependent on photosynthesis. Complete the following food chains by writing the names of appropriate organisms in the blanks: (ii) Grass/Corn → Mouse → Snake → Peacock. Draw a neat diagram of the stomatal apparatus found in the epidermis of leaves and label the Stoma, Guard cells, Chloroplast, Epidermal cells, Cell wall and Nucleus. (f) If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will fail to occur. Step 1:- Activation of chlorophyll. To study the effect of sunlight on the rate of photosynthesis. (g) The part of chloroplast where the dark reaction of photosynthesis takes place. “Oxygen is a waste product of photosynthesis.” Comment. (e) The phloem transports the photosynthetic products from the leaf to the other parts of the plant. State any four differences between photosynthesis and respiration. Step 2:- Splitting of water. This also suggests that both respiration and photosynthesis are complementary processes to maintain the concentration of oxygen and carbon dioxide in the atmosphere. Download pdf of Class 10 Chapter 6 in their respective links. Photosynthesis results in gain of dry weight of the plants. (f) If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will fail to occur. Solution:-. Raksha planted many plants in her home garden as she knew that the plants help to purify air. The time gap between the light and dark reaction is less than one thousandth of a second. (a) Dip the leaf in boiling water for a minute to kill the cells. This rise occurs up to the optimum temperature of 35oC (maximum suitable temperature when the photosynthesis occurs best) after which falls and stops above 40 Co. (c) If you immerse a leaf intact on the plant in ice cold water, it will continue to photosynthesize in bright sunshine. It is then placed in a dish and (3) …………. In this Goprep session of ICSE Class 10, our Goprep Biology expert Sona Sir will be discussing the Class 10 Biology chapter Photosynthesis. 1 for their survival. Chloroplasts are cell organelles, situated in the cytoplasm of plant cells. He took a potted plant and kept in the dark for over 24 hours. Animals derive their food from plants either directly by eating their part, or indirectly by eating the plant-eater. d. The gas released by green plants during photosynthesis. (b) Cuticle: Cuticle is transparent and water proof due to which light can penetrate this later easily. Date. (a) The student wanted to show that sunlight is necessary for photosynthesis. (cytoplasm, chloroplast, ribosomes), (d) The dark reaction of photosynthesis is known as ………….. (Hill reaction, cyclic phosphorylation, Calvin cycle), (e) In the flowering plants, food is transported in the form of ……………… (sucrose, glucose, starch), (a) The site of light reaction in the cells of a leaf  grana, (b) The chemical substance used to test the presence of starch in the cell of a leaf is iodine solution. Oxygen is released during photosynthesis. The presence of starch will be indicated by a blue-black colour. It is not possible to demonstrate respiration in green plants kept in sunlight because during day time plants are undergoing photosynthesis. When sunlight falls on the leaf, the light energy is trapped by the chlorophyll of the upper layers of mesophyll, especially the palisade cells. Given reason. (e) Draw a neat diagram of a chloroplast and label its parts. The chemical substance used to test the presence of starch in the cell of a leaf is an iodine solution. (g) Photosynthesis stops at a temperature of about 35oC. (b) Why was the plant placed in the dark before beginning the experiment? c. The fluid that transports fatty acids and glycerol. (f) Photosynthesis results in loss of dry weight of the plants. No living being can remain alive without oxygen. There is no start point or end point in the carbon cycle, the carbon is constantly circulated between the atmosphere and the living organisms. Carbon dioxide is used up and oxygen is released. Carbon dioxide is used up and oxygen is released. It is next boiled in methylated spirit to remove chlorophyll. Hence before starting an experiment on photosynthesis, the plant should be placed in the dark for 24-48 hours to destarch the leaves. 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. To test the leaf for starch, the leaf is boiled in water to kill the cells. All other organisms, directly or indirectly depend on this food for their survival. Chlorophyll is the foundation site for the photosynthesis in green plants. Identify the false statements and rewrite them correctly by changing the first or last word only. (1) Photosynthesis occurs only in green plants and photosynthetic bacteria. Question 1: Define transpiration. (a) Respiration and photosynthesis (gas released) Describe the main chemical changes which occur during photosynthesis in: 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. (ii) Dark reaction: The reactions in this phase does not require light energy and occur simultaneously with the light reaction. Plants release oxygen as a waste product during photosynthesis. a) Carbon dioxide is reduced and water is oxidised, b) Water is reduced and carbon dioxide is oxidised, c) Both carbon dioxide and water are oxidised, d) Both carbon dioxide and water are reduced, 7. Test to determine the presence of starch in a leaf: Given alongside is the diagram of an experimental set-up: (a) What is the objective of this experiment? In the darkness, respiration alone is responsible for changes in the gaseous composition of the plant’s surrounding atmosphere. 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) ……………. To test the leaf for starch, the leaf is boiled in water to kill the cells. Give reason in support of your answer. The pigment chlorophyll is contained in the walls of thylakoids. Answer the questions that follow: (a) Name the physiological process that releases the bubbles of oxygen. Invert a test tube full of water over the stem of the funnel. (h) Photosynthesis occurs only in cells containing chloroplasts. ATP (Adenosine triphosphate) stores energy in the cells. The grass is eaten up by the grasshopper. 6. The essential chemical steps in this process are the same in all green plants. Solution:-. (h) Photosynthesis occurs only in cells containing chloroplasts. The chloroplasts are concentrated in the upper layers of the leaf which helps cells to trap the sunlight quickly. 5. (d) Xylem tissue in the leaf veins The light reaction occurs in two main steps. 5. The leaf is placed in warm water to soften it. (c) Then place it again in hot water to soften it. Why is it necessary to place a plant in the dark before starting an experiment on photosynthesis? This is because if the plant is not destarched,              then the experiment will give false results because starch stored previously may be                          detected  in the leaf placed in the beaker even if no starch is produced during the                              experiment. (a) The candidate dipped the leaf in boiling water for a minute to kill the cells. Solution:-, (i) Green plants perform photosynthesis. Solution:-. (d) Name one natural element which all the organisms 2-4 and even 5 are getting from No. Describe this step and explain its necessity. Solution:-. Explain. Get free Selina Solutions for Concise Biology Class 10 Icse Chapter 5 Transpiration solved by experts. Bubbles appear in the stem which rise and are collected in the test tube. Chlorophyll is the green colouring matter found in plants. Yes, we have to take a step before starting the experiment. Chloroplasts are the kind of plastids found in the mesophyll cells of the leaf. The leaf is placed in warm water to soften it. The correct order in a logical sequence with regard to photosynthesis be. Reviewer. Mention one difference between the following on the basis of what is given in brackets. Here, we present set 1 of Photosynthesis flashcard notes. 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. Regulations of stomatal opening for letting in carbon dioxide, Two main phases of photosynthesis – (A) Light – Dependent Phase and (B) light – Independent (Dark) phase, Adaptations in leaf to perform photosynthesis, End result of the products of photosynthesis. When sufficient gas gets collected, a glowing splinter will be introduced in the test tube, which will burst into flames. 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