Question

For yielding one molecule of glucose the Calvin cycle turns

• A. two times
• B. four times
• C. six times
• D. eight times

Answer 1

Answer: (C)

six times

Answer 2

Conversion of $CO_{2}$ to simple (reduced) organic compounds is called $CO_{2}$ assimilation or $CO_{2}$ fixation or carbon fixation. This fixation pathway was elucidated in the early $1950\,s$ by Melvin Calvin and co-workers and is often called as Calvin cycle. Since one molecule of carbon is fixed in one tum of the Calvin cycle. So, six turns of the cycle are required to fix the glucose molecule containing $6$ carbon atoms.