Question
Download Solution PDFPhotochemically generated ATP is consumed in which one of the following phases of Calvin‐Benson cycle?
This question was previously asked in
CSIR-UGC (NET) Life Science: Held on (17 Feb 2022 Shift 1)
Answer (Detailed Solution Below)
Option 4 : Reduction and regeneration
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Download Solution PDFThe correct answer is Option 4 i.e. Reduction and regeneration
Key Points
- The Calvin cycle is a step in the photosynthetic process that converts atmospheric CO2 into sugar phosphates for use in a broader metabolism that supports the growth and development of plants.
- In the stroma of plant cell chloroplasts, the Calvin cycle occurs.
- There are eleven enzymes involved in this cycle, which has three stages:
- Carboxylation - carried out by the Rubisco enzyme (ribulose-1,5-bisphosphate carboxylase oxygenase)
- Reduction - of the C3 acids produced during the carboxylation reaction (the stage of sugar formation)
- Regeneration - of ribulose-1,5-bisphosphate (RUBP), which is the CO2-acceptor molecule of Rubisco enzyme.
Explanation:
- Reduction and regeneration are the two stages where ATP is consumed as shown in the figure above,
- Thus option 4 is the correct option and other mentioned options are false.
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