Question

In the Calvin cycle, the ratio of trioses formed, net gain, and used to regenerate RUBP is:

• A. 2 : 3 : 2
• B. 10 : 2 : 6
• C. 6 : 1 : 5
• D. 5 : 1 : 6

Hint:

Remember that the Calvin cycle is a light-independent reaction in photosynthesis, primarily occurring in the chloroplast stroma.

Answer 1

The Correct Option is C

In the Calvin cycle, for every 6 molecules of triose (a 3-carbon sugar) formed, 1 molecule is used for the net gain of the plant (to be used for growth, etc.), and 5 molecules are used to regenerate RUBP (Ribulose bisphosphate) for the continuation of the cycle. This gives the ratio of trioses formed, net gain, and used to regenerate RUBP as 6:1:5.