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What Is Dark Reaction

In the proces...

Question

In the process of carbon fixation, RuBP attaches a CO2 to produce a 6 carbon molecule, which is then split intwo. After phosphorylation and reduction, what more needs to happen in the Calvin cycle?

A

addition of a pair of electrons from NADPH

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B

inactivation of RuBP carboxylase enzyme

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C

regeneration of ATP from ADP

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D

regeneration of rubisco

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Solution

The correct option is D
regeneration of rubisco

This ensures that the cycle continues to take place and continue to fix CO2.

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Similar questions

Q. Choose the correct answer from the alternatives given.
The first event in the Calvin cycle is the attachment of carbon dioxide to the five-carbon RuBP molecule, which

Q. Consider the following statements and select correct set for photosynthesis in

C_{3}

-plants.
(a) Bifunctional nature of carboxylating enzyme
(b) It takes only one turns of the Calvin cycle to fix one molecule of glucose
(c) Regeneration of each RUBP requires 6 ATP
(d) First stable product of Calvin cycle undergoes phosphorylation in reduction step
(e) Only ATP is required

Q. Describe the process of

C_{3}

path of carbon fixation. How many

C O_{2}

molecules are needed for operation of its one cycle?

Q. Consider the following statements and select correct set for photosynthesis in

C_{3}

-plants.
(a) Bifunctional nature of carboxylating enzyme
(b) It takes only one turns of the Calvin cycle to fix one molecule of glucose
(c) Regeneration of each RUBP requires 6 ATP
(d) First stable product of Calvin cycle undergoes phosphorylation in reduction step
(e) Only ATP is required

Q. Calvin cycle has three stages. Identify the correct sequence.
1. Reduction during which carbohydrate is formed at the expense of photochemically made ATP and NADPH
2. Regeneration during which carbon dioxide acceptor 1, 5-RuBP is formed
3. Carboxylation during which

C O_{2}

combines with 1, 5-RuBP.

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