Question

multiple choice question
what is the net gain of the calvin cycle?
two molecules of g3p
one molecule of glucose
one molecule of sucrose
twelve molecules of pga

Explanation:

The Calvin - cycle is a part of photosynthesis. For every 3 turns of the Calvin cycle, 6 molecules of G3P (glyceraldehyde - 3 - phosphate) are produced, but only 1 molecule of G3P represents the net gain that can be used to make glucose or other organic compounds. After 6 turns of the cycle, 2 molecules of G3P are the net gain which can be combined to form 1 molecule of glucose. However, the immediate net gain of the Calvin cycle is considered to be two molecules of G3P. Glucose is not the immediate net gain, sucrose is not related to the immediate net gain of the Calvin cycle, and PGA (3 - phosphoglyceric acid) is an intermediate in the cycle, not the net gain.

Answer:

Two molecules of G3P