Question

How many molecules of NADPH are required for each Calvin cycle?

(a) 3

(b) 1

(c) 4

(d) 2

I have been asked this question at a job interview.

This is a very interesting question from Higher Plants Photosynthesis in chapter Photosynthesis in Higher Plants of Biology – Class 11

Answer 1

Right option is (d) 2

For explanation: For every carbon dioxide molecule used up in the Calvin cycle, 2 molecules of NADPH are required. Six cycles are required to produce one glucose molecule; hence 12 NADPH molecules are required to produce one molecule of glucose.