Upper Epidermis 3. The reaction requires energy in the form of light to overcome the activation energy needed for the reaction to proceed. Question 5: A leaf is a food factory. Name the experiment to demonstrate the importance of light for photosynthesis. (ii) Now the potted plant is kept in light. Question 4: What is the importance of photosynthesis in the life of the following : (i) Green plants (ii) Non-green plants (iii) Animals Answer: (i) Green plants are able to build up complex energy rich molecules of carbohydrates which are further used for different metabolic activities of cells. The process by which plants produce their food. Events in photosynthesis Photosynthesis can be split into three basic events. Match the term in Column ‘II’ with the suitable idea given in Column ‘I’. Plants release oxygen as a waste product during photosynthesis. Answer the following: (i) What is the aim of this experiment? equation of photosynthesis class 10 Photosynthesis 7. The alphabet ‘A’ represents a certain condition inside the flask. Which process is the ultimate source of energy for all living organisms ? (False, Transpiration occurs along with photosynthesis.) Stomata – through which exchange of gases takes place. Question 25: A candidate in order to study the importance of certain factors in photosynthesis took a potted plant and kept it in the dark for over 24 hours. These OH– react to liberate oxygen. Iodine, Question: 1. Name the tissue that transports manufactured starch from the leaves to all parts of the plant. Answer: During the day, the chloroplast in the guard cells are able to carry on photosynthesis, so the osmotic pressure in the cell sap of the guard cells is high and water enters the guard cells which lead to an opening of the stomatal aperture. Answer: Question 3: Chloroplast and Chlorophyll. Palisade tissue/chioroplast 4. (True) 3. The specific function of light energy in the process of photosynthesis is to: (a) Reduce.carbon dioxide (b) Synthesize glucose (c) Activate chlorophyll (d) Split water, 3. It is rinsed with hot water to remove alcohol and spread it on a white tile. 6. Question 22: What is meant by destarched plant ? 6CO2 + 6H2O — > C6H12O6 + 6O2. (iii) There are numerous stomata to allow rapid exchange of gases. Chloroplasts are regarded as complete photosynthetic units of plants. (iii) Photosynthesis. (ii) Name the membrane that connects thylakoid of one granum With the other granum. Photosynthesis, derived from the Greek words photo, meaning "light," and synthesis "putting together," is a process used by plants and some bacteria to harness the energy from sunlight to convert water and carbon dioxide to produce sugar (glucose) and oxygen. The various processes resulting in the circulation of carbon in different forms constitute the carbon cycle. (iii) Light is necessary for photosynthesis. Plastoquinone 6. Out of nine types of chlorophyll, chlorophyll ‘a’ and ‘b’ are most abundant. (ii) Identify the special condition inside the flask. Question 7: A well watered healthy potted plant with variegated leaves was kept in darkness for about 24 hours. H2 ———> H+ + OH–. Question 11: “Oxygen is a waste product of photosynthesis.” Comment. After a few hours pluck the leaf and remove the black strips. It takes place in chlorophyll containing thylakoids of chloroplast. (v) The leaf is then washed in water and tested with iodine. Starch 10. (True) 8. 4. Answer: Oxygen liberated during photosynthesis is a waste for the plant, so, it is released into air and is used by living organisms in respiration. Photosynthesis: It is the process by which green plants manufacture food by using carbon dioxide and water in the presence of sunlight. 2. Glucose 9. (Photon) 3. Question 8: Which tissues and cells are mainly concerned with photosynthesis ? 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