Q. With reference to three Calvin cycles, which of the given options is correct for the following question? I. How many gross PGAL molecules are produces? II. Total, how many ATP molecules are required for synthesis of PGAL molecules? II. Total, how many $NADPH_{2}$ molecules are required for the synthesis of obtained PGAL molecules?
A) I-3PGAL, II-3 ATP, III-3 $NADPH_{2}$
B) I-6 PGAL, II-6 ATP, III-6 $NADPH_{2}$
C) I-18 PGAL, II-18 ATP, III-18 $NADPH_{2}$
D) I-9 PGAL, II-9 ATP, III-9 $NADPH_{2}$
Explanation
In Calvin cycle, ribulose 1-5 biphosphate ultimately produces two molecules of 3 PGAL, i.e., total 6 molecules by three Calvin cycles. In the same one ATP for each 3 PGAL molecules is phosphorylated (Total 6 ATP).
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.