Table of Contents
Why do the reactions of the Calvin cycle usually not occur at night quizlet?
The reactions of the Calvin cycle are NOT directly dependent on light, but they usually do NOT occur at night. Plants usually open their stomata at night or The Calvin cycle requires products only produced when the photosystems are illuminated.
Does Calvin cycle occur in dark?
reactions” of the Calvin cycle actually occur in the dark. The reality of the situation is that several enzymes in the so-called “dark reactions” are, in fact, indirectly dependent on the presence of light for their activity.
Can the Calvin cycle can occur in a plant in a dark room so long carbon dioxide ATP and Nadph are present why?
True or False The Calvin cycle (= light-independent reactions) can occur in a plant that is in dark room so long as the materials carbon dioxide, ATP, and NADP-H are present. True. One molecule of phosphoglyceraldehyde (= PGAL) contains more energy than three molecules of carbon dioxide.
Does Calvin cycle require sunlight?
This process may also be called the light-independent reaction, as it does not directly require sunlight (but it does require the products produced from the light-dependent reactions).
Why does sugar production stop even though the Calvin cycle does not require light?
RuBP produced in the light reactions facilitates the fixation of carbon from carbon dioxide in the Calvin cycle. Even though it can’t carry out the light reactions, the plant can still produce sugars because the Calvin cycle doesn’t require light.
Why is the Calvin cycle referred to as the dark reaction?
Only the light reaction directly uses light. The Calvin cycle is fueled by products from the light reaction, but doesn’t need light. Therefore it is called the dark reaction.
Do dark reactions occur at night?
No, the dark reaction does not occur at night. It occurs during the day, but the reaction does not use the light directly. Therefore, it is known as the dark reaction.
Can dark reactions occur at night?
Does the dark reaction occur at night? No, the dark reaction does not occur at night. It occurs during the day, but the reaction does not use the light directly. Therefore, it is known as the dark reaction.
Does not occur during Calvin cycle?
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 reduced NADP which is short-lived and comes from the light-dependent reactions.
Why does the Calvin cycle not occur at night?
1. 1. Although the reactions of the Calvin cycle do not depend directly on light, they do not usually occur at night. Why? a. At night, plants have a negative water balance with the soil, due to reduced evaporation.
How are electrons used in the Calvin cycle?
1. In the light reactions, light energy is used to oxidize… 2. The electrons derived from this oxidation reaction in the light reactions are used to reduce… 3. The Calvin cycle oxidizes the light-reactions product… . 4. The electrons derived from this oxidation reaction in the Calvin cycle are used to reduce…
Why are sugars produced in the Calvin cycle?
Even though it can’t carry out the light reactions, the plant can still produce sugars because the Calvin cycle doesn’t require light. While it did have access to light, the plant stored energy in the form of sugars or starch, and it was able to derive energy from the stored molecules during your vacation.
How are ATP and NADPH used in the Calvin cycle?
The light reactions produce ATP and NADPH, both of which are used in the Calvin cycle. The light reactions produce ADP and NADP+, both of which are used in the Calvin cycle. The light reactions produce water, ATP, NADPH, all of which are used in the Calvin cycle.