AP BIOLOGY

PHOTOSYNTHESIS

THE CALVIN CYCLE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
TRUE or FALSE. The Calvin Cycle can happen during the day and at night.
A
True
B
false
Explanation: 

Detailed explanation-1: -Though it is called the “dark reaction", the Calvin cycle does not actually occur in the dark or during night time. This is because the process requires NADPH, which is short-lived and comes from the light-dependent reactions.

Detailed explanation-2: -Electron transfer helps generate NADPH and ATP, which are used in the Calvin cycle. Therefore, the Calvin cycle is more likely to happen during daylight after the light-dependent stage has sufficiently produced NADPH and ATP.

Detailed explanation-3: -The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night.

Detailed explanation-4: -The plants shut down the Calvin Cycle in the dark when the levels of ATP and NADPH decline because the Calvin Cycle needs reduced NADP, which is short-lived and occurs from light-dependent reactions.

Detailed explanation-5: -Answer and Explanation: The statement that is false concerning the Calvin-Benson cycle is it D. oxidizes carbons.

There is 1 question to complete.