Question

How many Calvin cycles are required to produce 5 molecules of glucose?

• A. 60
• B. 15
• C. 30
• D. 90

Answer 1

The correct option is C 30

Glucose is a hexose sugar and therefore, one molecule of glucose contains 6C atoms.
As Calvin cycle takes in only one carbon $\left(asC{O}_2\right)$ at a time, six turns of this cycle is required to produce one molecule of glucose (6C).
Hence, for producing 5 molecules of glucose (30 molecules of carbon), 30 turns of Calvin cycle are required.