As a Research Scientist, You Measure the Amount of ATP

Multiple Choice

As a research scientist, you measure the amount of ATP and NADPH consumed by the Calvin cycle in one hour. You find that 30,000 molecules of ATP were consumed, but only 20,000 molecules of NADPH were consumed. What is the source of the extra ATP molecules?

A) photosystem II
B) photosystem I
C) cyclic electron flow
D) linear electron flow