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Photosynthesis in Higher Plants

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

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)

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Ques. 2AIPMT 2000

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

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