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Photosynthesis in Higher Plants · Question 77

AIPMT 2000MCQEasy📈 Topic in 88% papers+4−1
1

For the synthesis of one glucose molecule the Calvin cycle operates for

  1. 2 times
  2. 4 times
  3. 6 times
  4. 8 times

Answer

(3) 6 times

Solution

As per NCERT, one CO2 molecule is fixed in each turn of the Calvin cycle.

∵ Glucose ( C6H12O6) contains 6 carbon atoms,

∴ number of turns = 6 (using 6 CO2, 18 ATP and 12 NADPH).

Answer: (3)

AIPMT 2000

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2

The first step for initiation of photosynthesis will be

  1. photolysis of water
  2. excitation of chlorophyll molecules due to absorption of light
  3. ATP formation
  4. glucose formation
AIPMT 2000

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