Carbon dioxide is used up and oxygen is released. Carbon dioxide is used up and oxygen is released. (c) During the starch test, why was the leaf. (b) Cuticle: Cuticle is transparent and water proof due to which light can penetrate this later easily. Solution:-. They are present mainly in the mesophyll cells and in the guard cells of stomata. The electrons (e–) are used in converting ADP into energy rich ATP by adding one inorganic phosphate group Pi.ADP + Pi  ATP. No, the experiment will not work satisfactorily because, as mentioned in the above statement carbon dioxide is very important in the photosynthesis. The male hormone produced by the interstitial cells. 2. Our expert faculty will help you cover every bit of all ICSE Class 10 Biology chapters in upcoming sessions as well. The potted plant was then placed in sunlight for a few hours. Green plants (producers) use carbon dioxide of the air to produce carbohydrates and release oxygen to the atmosphere. (1) The leaf is boiled in water for a minute to kill the cells. (b) No, the experiment will not work satisfactorily, as the beaker contains lime water and not                   potassium hydroxide to absorb CO­2. ICSE Class 10th Biology Photosynthesis MCQS. This also suggests that both respiration and photosynthesis are complementary processes to maintain the concentration of oxygen and carbon dioxide in the atmosphere. Glucose is the main product formed during dark reaction. Solution:-. Solution:-, (e) Chlorophyll and chloroplast (part of plant cell), 2. The potted plant was then placed in sunlight for a few hours. If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will continue to occur because the dark reaction is independent of light and it occurs simultaneously with the light dependent reaction. Photosynthesis is a chapter of ICSE Class 10 Biology textbook. (a) Guard cells: They regulate the opening and closing of stomata and thus regulate the entry of carbon dioxide through the stomata. (c) Then place it again in hot water to soften it. It is then placed in a dish and iodine solution in added. Selina Solutions Concise Biology Class 10 Chapter 6 Photosynthesis, is the most significant life process. CO2 is also the product of respiration. d.The student dipped the leaf in boiling water for a minute to kill the cells. and the region, which does not contain starch, turns (5) ………………. The difference in the colours of covered and uncovered part of leaves indicates the importance of sunlight in photosynthesis. 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 Available here are Chapter 5 - Transpiration Exercises Questions with Solutions and detail explanation for your practice before the examination The oxygen (O) component is given out as molecular oxygen (O2). (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. 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) ……………. How do non-green plants such as fungi and bacteria obtain their nourishment? A potted plant was taken in order to prove a factor necessary for photosynthesis. We know that temperature is an important factor for the rate of photosynthesis. Hence, it is difficult to demonstrate respiration as these two processes occur simultaneously. (c) Mesophyll cells: Mesophyll cells are the main sites for photosynthesis. sucrose, which is transported in solution through the phloem in the veins of the leaf and down through the phloem of the stem. This matter comes from dead animals and plants, which in their own turn were dependent on photosynthesis. The presence of starch is regarded as evidence of photosynthesis. The leaf now becomes hard and brittle. Identify the false statements and rewrite them correctly by changing the first or last word only. Free PDF download of ICSE Class 10 Biology revision notes and short key-notes to score more marks in your exams, prepared by our expert Biology teachers as per CISCE guidelines. The gas released during photosynthesis is oxygen. (e) Draw a neat diagram of a chloroplast and label its parts. (a) Define photosynthesis. (3) Respiration consists of two stages, they are inhalation and exhalation. We provide step by step Solutions for ICSE Biology Class 10 Solutions Pdf. A plant used for an experiment on photosynthesis should initially be placed in the dark for 24 to 48 hours to destarch the leaves. Is there any control in this experiment? Thylakoids. Dark reaction of photosynthesis occurs simultaneously with light reaction. c. Why was the plant kept in the dark before the experiment? (a)The hydrogen ions (H+) are picked up by a compound NADP (Nicotinamide adenine dinucleotide phosphate) to form NADPH. With four organisms 1 – 4. Thus, the release of CO2 cannot be demonstrated. This increases the rate of photosynthesis in the plant placed in test tube B. Share your Results: Facebook Twitter Google+ VK. (g) Photosynthesis is considered as a process supporting all life on earth. (b) The kind of plastids found in the mesophyll cells of the leaf. In every period of twenty-four hours, plants are subjected to a regular cycle change in light intensity, and the rate of photosynthesis increases from dawn to midday and declines as dusk approaches. (a) What aspect of photosynthesis was being tested? (C) The electrons (e–) are used in converting ADP (adenosine diphosphate) into energy-rich compound ATP (adenosine triphosphate) by adding one phosphate group Pi (inorganic phosphate), (ii) The reaction is the phase do not require light energy and occur simultaneously with the light reaction (time gap between the two being less than even one-thousandth of a second). To obtaining expected result replace the lime water from potassium hydroxide because it absorbs carbon dioxide. Solution:-, (b) Light and dark reactions (products formed) ICSE Class 10th Biology 4 - Photosynthesis MCQS. The upper surface is thicker than the lower surface and also the epidermis is covered by a waxy, waterproof layer of cuticle. (c) Place the apparatus in the sun for a few hours. Solution:-. Your email address will not be published. d. Describe step by step, how the candidate proceeded to test the leaf for the presence of starch? A series of chemical reactions occur in very quick succession, initiated by light and therefore, the phase is called the photochemical phase. Our specialist teachers have answered these exercises to help you with your exam preparation to achieve good marks in the subject. 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. Also learn about the factors affecting photosynthesis. (d) Photosynthesis requires enzymes. (f) Write the overall chemical equation for the above process. The glucose is converted into insoluble starch and later into soluble sugar i.e. (a) Photosynthesis releases bubbles of oxygen. 12. Chlorophyll is the green pigment present in cell organelles called chloroplasts. Now place the leaf in hot water to soften it. One would easily think that the rate of photosynthesis will increase with light intensity. 6. These solutions can help students clear doubts quickly and help in learning the topic effectively. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch. Oct 16 • Board Sample Papers • 6131 Views • 1 Comment on ICSE Sample Paper of Biology Class 10 Indian Certificate of Secondary Education ( ICSE ) is an examination conducted by the Council for the Indian School Certificate Examinations which is a private non-governmental board of school education in India for class X. Correct Statement: Starch produced in a leaf is stored temporarily in the leaf until the process of photosynthesis. Correct Statement: Respiration results in loss of dry weight of the plants. 4. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch. It takes place in the presence of light. (f) The source of carbon dioxide for aquatic plants. A candidate studied the importance of certain factors in photosynthesis. Chloroplasts are mainly contained in the mesophyll cells. If a plant is kept in bright light all the 24 hours for a few days, the dark reaction (biosynthetic phase) will continue to occur because these set of reactions are independent of light and it occurs simultaneously with the light-dependent reaction. ... Download Formulae Handbook For ICSE Class 9 and 10. (d) Why does test-tube B have more bubbles of oxygen? Photosynthesis increases with the light intensity up to a certain limit only, and then it gets stabilised at the point. (e) The organisms that can be called “natural purifiers” of the air. Practice biology sample question papers to score high in exams. b. Photosynthesis in green plants is directly and indirectly dependent on so many plant structures. (a) The site of light reaction in the cells of a leaf is……………… (cytoplasm, stroma, grana). (a) To demonstrate the importance of carbon dioxide in photosynthesis. (b) Immediate product of photosynthesis is glucose. Why? 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