questions on photosynthesis for class 10 icse

(b) Invert a test-tube full of water over the stem of the funnel. The raw material for respiration is glucose. The essential chemical steps in this process are the same in all green plants. (b) Why was the plant placed in the dark before beginning the experiment? We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. Oxygen supports all life on earth. The region, which contains starch, turns blue-black and the region, which does not contain starch, turns brown. List of subtopics covered in Selina Solutions Concise Biology Class 10 Chapter 6 Photosynthesis, Your email address will not be published. (c) Stroma is the ground substance in …………… (cytoplasm, chloroplast, ribosomes). General Instructions: Answers to this Paper must be written on the paper provided separately. It is then placed in a dish and iodine solution in added. These important questions are systematically arranged according to the ICSE Class 10 Biology syllabus and are advised to be solved on a daily basis. Fungi and bacteria break down the organic matter to obtain the nourishment and they release carbon dioxide back in the atmosphere. The leaves will not show the presence of starch. Students can download the ICSE Class 10 Biology Question Paper Solution 2018 PDF from the link below. (e) The starting point of carbon cycle is the release of CO2 by animals during respiration. (e) The phloem transports the photosynthetic products from the leaf to the other parts of the plant. (g) Photosynthesis stops at a temperature of about 35oC. (c) Mesophyll cells: Mesophyll cells are the main sites for photosynthesis. 6. Ordinarily, there may be 40-50 chloroplasts in a cell. (f) Write the overall chemical equation for the above process. This reaction is known as photolysis of water. The leaves will not show the presence of starch. Multiple Choice Questions (MCQ) for ICSE Class 10 Biology chapters on Topperlearning. Chloroplasts are cell organelles, situated in the cytoplasm of plant cells. sucrose, which is transported in solution through the phloem in the veins of the leaf and down through the phloem of the stem. 1 for their survival. The time gap between the light and dark reaction is less than one thousandth of a second. The light reaction occurs in two main steps. (c) False 1 Marks Questions Answer : Insulin or glucagon are the hormones secreted by the islets of Langerhans. In the dark reaction, ATP and NADPH molecules (produced during light reaction) are used to produce glucose (C6H12O6) from carbon dioxide. Biology Class 10 ICSE Syllabus: If you want to score high in the ICSE exam, our Biology notes for Class 10 chapter-wise for ICSE board are apt for you. Animals derive their food from plants either directly by eating their part, or indirectly by eating the plant-eater. (c) Mesophyll cells (both palisade and spongy) in a leaf are the principal centres of the photosynthesis. To study the effect of sunlight on the rate of photosynthesis. ICSE Biology Previous year Question Paper 2019 Solved for Class 10 ICSE 2019 Biology Board Question Paper Solved. During this period, all the starch will be removed from the leaves and stored in the storage organs. Required fields are marked *. 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. 12. Chloroplasts are mainly contained in the mesophyll cells. Chlorophyll is the green colouring matter found in plants. The rate of photosynthesis increases up to the temperature 35oC after which the rate falls and the photosynthesis stops after 40oC. Mark as IMP ... Topic Notes. (a) Respiration and photosynthesis (gas released) Answer : c) Hyposecretion of thyrosine Answer : TSH is the abbreviation for Thyroid Stimulating Hormone. Selina ICSE Chapter 5 Photosynthesis Provider of Food for All Solutions for Class 10 all questions are answered and explained by expert teachers as per ICSE board guidelines. Respiration results in loss of dry weight of the plants. (e) Phloem tissue in Leaf Veins (b) Immediate product of photosynthesis is glucose. Food chain To obtaining expected result replace the lime water from potassium hydroxide because it absorbs carbon dioxide. Green grass being a producer is capable of producing its own food by photosynthesis. Solution C.5. All exercise questions are solved & explained by expert teacher and as per ICSE board guidelines. 10. Some of this oxygen may be used in respiration in the leaf cells, but the major portion of it is not required and it diffuses out into the atmosphere through the stomata. (e) Sucrose. Glucose is produced which is utilized by the plants. Solution:-, (d) Grass and grasshopper (mode of nutrition) The light reaction occurs in two main steps: The fate of H+, e– and (O) component are as follows: 7. (a) What aspect of photosynthesis was being tested? Free download of step by step solutions for class 10 Biology Chapter 6 - Photosynthesis of ICSE Board Concise - Selina Publishers. Selina Solutions Concise Biology Class 10 Chapter 6 Photosynthesis is the best study material for those students who are finding difficulties in answering the questions. ICSE Solutions for Class 10 Biology. 15. Solution:-. If a green plant is kept in bright light, it tends to use up all the CO2 produced during respiration, for photosynthesis. APlusTopper.com provides step by step solutions for Selina Concise ICSE Solutions for Class 10 Biology Chapter 6 Photosynthesis: Provider of Food for All. 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. Give reason. In the darkness, respiration alone is responsible for changes in the gaseous composition of the plant’s surrounding atmosphere. ICSE Class 10 Biology solutions for chapter-6 Photosynthesis. Destarching means removal of starch. Students of ICSE Class 10 should practise the ICSE Class 10 Important Questions of Biology to ace in their final examination. 3. Multiple Choice Questions. 6. Solution C.10. (a) The rate of photosynthesis continues to rise as long as the intensity of light rises. The presence of starch will be indicated by a blue-black colour. (d) Xylem tissue in the leaf veins Photosynthesis provides food not only to the plant itself but to all animal life including humans as well, and also the life-supporting free oxygen gas in the atmosphere for breathing. b. All life owes its existence to chlorophyll. Maximum students of CISCE Class 10 prefer Selina Textbook Solutions to score more in exam. Describe this step and explain its necessity. For destarching, the potted plant can kept in a dark room for 24-48 hours. The region, which contains starch, turns blue-black colour and the region, which does not contain starch, turns brown colour. During photosynthesis, the oxygen in glucose comes from, (a) The category of organisms that prepare their own food from basic raw materials. Producers show autotrophic mode of nutrition i.e. A candidate studied the importance of certain factors in photosynthesis. Solution C.3. 13. The leaf is placed in warm water to soften it. With four organisms 1 – 4. Explain. Excretory System. ICSE Class 10 Biology Question Paper 2018. 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) ……………. (c) Mesophyll cells The main aim of this experiment is to describe the importance of carbon dioxide in the photosynthesis. To some extent, it is true. Name the following: The student wanted to show that sunlight is necessary for photosynthesis. The light energy is then converted into chemical energy in the form of glucose using carbon dioxide (CO2) from the atmosphere, and water (H2O) from the soil. Which one chemical reaction occurs during photosynthesis? (c) What is the purpose of keeping a snail in test-tube B? The absorbed energy is used in splitting the water molecule (H2O) into its two components (Hydrogen and Oxygen) and releasing electrons. Photosynthesis prepared by Academic team of Entrancei . (i) Light Reaction:  Solution:-, (g) The part of chloroplast where the dark reaction of photosynthesis takes place. Hence before starting an experiment on photosynthesis, the plant should be placed in the dark for 24-48 hours to destarch the leaves. The potted plant was then placed in sunlight for a few hours. 4. A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to destarch the leaves. Chloroplasts are the kind of plastids found in the mesophyll cells of the leaf. It is next boiled in methylated spirit to (2) ……………. b. CO2 is also the product of respiration. 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. (b) Name any one organism that could be shown at No.5. Solution:-. It is contained in microscopic cell organelles called chloroplasts. Carbon dioxide is used up and oxygen is released. they are able to produce their own food from basic raw materials. Inference: It is next boiled in methylated spirit to remove chlorophyll. (b) Explain the physiological process as mentioned above in (a). MULTIPLE CHOICE TYPE Photosynthesis ICSE Class-10 Concise Selina Biology Question 1 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) Then boiled the leaf in methylated spirit over a water bath till it becomes pale-white due to the removal of chlorophyll. Given below is the diagram of an experimental set-up: (a) What is objective of this experiment? We know that the oxygen is consumed during respiration in plants hence it cannot be demonstrated at the daytime, as plants carry out respiration at night. (ii) Grass/Corn → Mouse → Snake → Peacock. (d) Xylem Tissue in the Leaf Veins: Water is essential for photosynthesis to occur. The initiation of photosynthesis takes place when the chlorophyll molecule traps the light energy. Concise Biology ICSE Class 10 Solutions Selina Publishers. This matter comes from dead animals and plants. Photosynthesis is the biological process which was the starting point of the whole chain. Download Formulae Handbook For ICSE Class 9 and 10, Selina ICSE Solutions for Class 10 Biology Chapter 6 Photosynthesis: Provider of Food for All, Solution A.1. Solution:-. 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. What is given out as molecular oxygen ( O ) component is given out as oxygen! Score good marks in ICSE Class 10 Chapter 6 in their cells to produce their own from! Portion showed brown colour of leaves indicates the importance of carbon dioxide and in. Their food turns ( 4 ) the xylem consists of two stages light reaction ( ii ) Name biological. Dioxide is used by other parts of the chloroplast through a series of chemical reactions occur in very quick,... 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