1) ATP molecules required for synthesis of a glucose molecule in Calvin-Benson cycle are a) 6 b) 18 c) 36 d) 12 e) 24 2) RuBisCO is the most abundant enzyme in the world because: a) It is required by the green plants for photosynthesis b) It can absorb maximum CO2 during photosynthesis. c) Its active site can bind with both CO2 and O2 and is found in leaves d) It can release oxygen from all the plants in the world 3) Which of the following constituents are prerequisite for Calvin cycle? a) CO2, ATP, NADP+, Pi b) CO2, ADP, NADP+, Pi c) CO2, H2O, ATP, NADPH d) CO2, ADP, NADPH e) ATP, NADPH, ADP 4) For the formation of one molecule of Glucose, how many turns of fixation are required? a) 3 b) 4 c) 6 d) 5 e) 2 5) Dark reaction depends upon- a) Presence of darkness b) Presence of light c) Products of light reactions d) Products of biosynthetic phase 6) Which stage of the Calvin Cycle utilizes ATP? a) Carboxylation b) Reduction c) Regeneration d) Both 2 and 3 e) All of them  7) The reaction that is responsible for the primary fixation of CO2 is catalysed by a) RUBP carboxylase b) PEP carboxylase c) RuBP carboxylase and PEP carboxylase d) PGA synthase 8) The order of the three steps of Calvin cycle is- a) Carboxylation- Reduction-Regeneration b) Reduction-Regeneration- Carboxylation c) Regeneration-Carboxylation- Reduction d) Reduction- Carboxylation -Regeneration 9) The first dark reaction or CO2 fixation product is- a) 3C - Organic Acid b) 6C - Organic Acid c) 5C - Organic Acid d) 1C - Organic Acid 10) The synthesis of one molecule of glucose during the Calvin cycle requires a) 12 molecules of ATP and 18 molecules of NADPH2 b) 6 molecules of ATP and 12 molecules of NADPH2 c) 18 molecules of ATP and 12 molecules of NADPH2 d) 12 molecules of each of ATP and NADPH2

C3 CYCLE

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