Respuesta :
Answer:
The correct answer is a The calvin cycle requires products only produced when the photsystems are illuminated .It is often too cold at night for the reaction to take place.
Explanation:
It is true that the reactions of calvin cycle are not directly depends on light but depends on the products such as ATP and NADPH produced during light reaction.
ATP and NADPH is formed by the illumination of photosystems by sun light.So during night time there is no chance for the light dependent illumination of the photosystems.
As a result the ATP and NADPH are not formed during night .That"s why reactions of calvin cycle does not occur at night.
The reactions of the Calvin cycle are not directly dependent on light, but they usually do not occur at night because:
a. The Calvin cycle requires products only produced when the photosystems are illuminated. It is often too cold at night for these reactions to take place.
Calvin cycle:
The Calvin cycle is not totally independent of light since it relies on ATP and NADH, which are products of the light-dependent reactions.
The light-independent reactions of the Calvin cycle can be organized into three basic stages:
- Fixation
- Reduction
- Regeneration
The correct choice of answer will be:
a. The Calvin cycle requires products only produced when the photosystems are illuminated. It is often too cold at night for these reactions to take place.
- The Calvin cycle is a dark reaction because it does not need sunlight. Although it can happen during the day, this process does not require energy from the sun to work.
Thus, the correct option will be a.
Find more information about "Calvin cycle" here:
brainly.com/question/920840
