Tiêu đề 13.PHOTOSYNTHESIS IN HIGHER PLANTS.pdf ✅

CHAPTER 11 PHOTOSYNTHESIS IN HIGHER PLANTS Exercise 1 : NCERT Based Topic-wise MCQs 11.1 WHAT DO WE KNOW? 1. Photosynthesis is a/an: NCERT Page-206 / N-133 (a) physio-chemical process. (b) physical process. (c) chemical process. (d) energy wasting process. 2. Photosynthesis is important because: NCERT Page-206 / N-133 (a) it is the primary source of food on earth. (b) it is responsible for release of O2 into the atmosphere by green plants. (c) it is responsible for release of water vapour into the atmosphere. (d) both (a) and (b) 3. Which one represents the correct empirical equation of photosynthesis? (a) C6H12O6 + 6O2 → 6CO2 + 6H2O + energy NCERT Page-208 / N-135 (b) C6H12O6 + 6O2 + 6H2O → 6CO2 + 12H2O + energy (c) 6CO2 + 6H2O → Light Chlorophyll 6O2 + C6H12O6 (d) 6CO2 + 12H2O → Light Chlorophyll 6O2 + C6H12O6 + 6H2O 4. Photosynthesis is the transformation of NCERT Page-206 / N-133 (a) light energy to chemical energy. (b) chemical energy to light energy. (c) light energy to kinetic energy. (d) solar energy to potential energy. 11.2 EARLY EXPERIMENTS 5. One of the earliest experiments on photosynthesis was done in 1770 by Joseph Priestley. He demonstrated that: NCERT Page-207 / N-134 (a) sun is the ultimate source of energy. (b) water is essential for life. (c) plants & animals "restore" the air for each other. (d) chlorophyll captures light energy. 6. Contribution of Ingen-Housz in elucidation of process of photosynthesis is that:NCERT Page-207 / N-134 (a) only green parts of plants exposed to light can convert foul air (CO2 ) into pure air (O2 ). (b) green plants convert light energy into chemical energy
(c) plants have the capacity to purify foul air. (d) sunlight is the ultimate source of energy for plants and animals. 7. The experiment material used by Van Neil, to prove that O2 comes out from water was studied on (a). Chlorella pyrenoidosa NCERT Page-208 / N-135 (b) Cladophora (c) purple & green sulphur bacteria (d) blue green algae 11.3 WHERE DOES PHOTOSYNTHESIS TAKE PLACE? 8. The pigment molecules responsible for photosynthesis are located in the: (a) cytoplasm of the cell. NCERT Page-209 / N-137 (b) matrix of the mitochondria. (c) thylakoid membrane of the chloroplast. (d) All of the above 9. Which of the following does participate in the process of photosynthesis? (a) Red algae (b) Green algae (c) Brown algae (d) All of these 10. Which part of the plant do not perform photosynthesis? (a) Cactus stem NCERT Page-209 / N-137 (b) Guard cell of stomata (c) Mesophyll cells of leaf (d) Leaf epidermis 11. The given figure shows the diagrammatic representation of a section of chloroplast. Few parts are marked as A, B, C, D & E. NCERT Page-209 / N-136 Combination of which parts is responsible for trapping the light energy & also the synthesis of ATP and NADPH? (a) A, B, C (b) B, C, D (c) C,D, E (d) A,D, E

19. In a plant cell, which of the following pigments participates directly in the light reactions of photosynthesis? NCERT Page-211 / N-137 (a) Chlorophyll a (b) Chlorophyll b (c) Chlorophyll d (d) Carotenoids 20. In photosynthesis, protons accumulate in the: NCERT Page-211 / N-136 (a) inner membrane space of mitochondria. (b) matrix of mitochondria. (c) lumen of thylakoid. (d) stroma of thylakoid. 21. Which one of the following is incorrect about the activities associated with PS-I and PS-II in non-cyclic photophospho- rylation? NCERT Page-211 / N-138 (a) Water is oxidised in PS - II, but not in PS - I. (b) Photons (light) are needed to activate both PS - I and PS - II. (c) Photolysis of water, formation of ATP + NADPH + H occur. (d) Production of NADPH + H + is associated with PS - II, but not with PS - I. 22. Which of the following statement is incorrect? NCERT Page-211 / N-138 (a) Photosystem-I receives electrons from photosystem-II. (b) Photosystem-II receives electrons from photolytic dissociation of water. (c) Formation of NADPH is associated with photosystem -II. (d) Reaction centre of photosystem I is P700. 23. Which among the following sentence is incorrect about light reaction? NCERT Page-211 / N-138 (a) It is also known as 'photochemical' phase. (b) It includes light absorption, water splitting, oxygen release, and the formation of high-energy chemical intermediates. (c) Reaction centre consist of single molecule of chl a but 2 molecules of chlb. (d) Pigments are organised into 2 discrete photochemical light harvesting complexes (LHC) within PS - I and PS - II. 24. During the light stage of photosynthesis, the photoactivated pigment removes an electron from the hydroxyl radical derived from the water molecule. The fate of the free hydroxyl radical is that it: NCERT Page-212 / N-138 (a) is broken down into oxygen and a free radical of hydrogen. (b) is used to raise the activation level of chlorophyll by donating a positive charge. (c) is used to produce adenosine triphosphate from adenosine diphosphate. (d) reduces carbon dioxide to sugar. 25. Reduction of NADP+ into NADPH during light reaction occurs in stroma because: NCERT Page-212 / N-139 (a) NADP reductase enzyme is located on the stroma side of membrane. (b) PS - I reduces NADP+to NADPH + H +in the stroma. (c) The pH of the stroma remains constant. (d) Both (a) and (b) are correct.