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Which one of the following is represented by Calvin cycle? [1996]
- a)Reductive carboxylation
- b)Oxidative carboxylation
- c)Photophosphorylation
- d)Oxidative phosphorylation.
Correct answer is option 'A'. Can you explain this answer?
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Which one of the following is represented by Calvin cycle? [1996]a)Red...
In dark phase of calvin cycle of photosynthesis the CO2 is reduced to Glucose in stroma of chloroplast, making use of the ATP & NADPH2, (available from light phase).
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Which one of the following is represented by Calvin cycle? [1996]a)Red...
Reductive carboxylation where glucose is formed from the carbon dioxide nd water... By reduction
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Which one of the following is represented by Calvin cycle? [1996]a)Red...
Calvin cycle is represented by reductive carboxylation.
Explanation:
Calvin cycle, also known as the Calvin-Benson cycle or the C3 cycle, is a series of biochemical reactions that take place in the stroma of chloroplasts during photosynthesis. It is named after Melvin Calvin, who discovered the cycle along with Andrew Benson and James Bassham in the 1950s.
The Calvin cycle is responsible for the synthesis of glucose, which is the main product of photosynthesis. It occurs in three main stages: carbon fixation, reduction, and regeneration.
1. Carbon Fixation:
During carbon fixation, carbon dioxide molecules are incorporated into an organic molecule called ribulose-1,5-bisphosphate (RuBP). This process is catalyzed by the enzyme RuBisCO (ribulose-1,5-bisphosphate carboxylase/oxygenase). The resulting compound is highly unstable and quickly breaks down into two molecules of 3-phosphoglycerate (3-PGA).
2. Reduction:
In the reduction phase, ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) generated during the light-dependent reactions of photosynthesis are used to convert 3-PGA into glyceraldehyde-3-phosphate (G3P). This step requires energy and involves a series of enzymatic reactions.
3. Regeneration:
During the regeneration phase, some of the G3P molecules are used to regenerate RuBP, which is necessary for the continuation of the Calvin cycle. The remaining G3P molecules can be converted into glucose or other organic compounds.
Explanation:
Calvin cycle, also known as the Calvin-Benson cycle or the C3 cycle, is a series of biochemical reactions that take place in the stroma of chloroplasts during photosynthesis. It is named after Melvin Calvin, who discovered the cycle along with Andrew Benson and James Bassham in the 1950s.
The Calvin cycle is responsible for the synthesis of glucose, which is the main product of photosynthesis. It occurs in three main stages: carbon fixation, reduction, and regeneration.
1. Carbon Fixation:
During carbon fixation, carbon dioxide molecules are incorporated into an organic molecule called ribulose-1,5-bisphosphate (RuBP). This process is catalyzed by the enzyme RuBisCO (ribulose-1,5-bisphosphate carboxylase/oxygenase). The resulting compound is highly unstable and quickly breaks down into two molecules of 3-phosphoglycerate (3-PGA).
2. Reduction:
In the reduction phase, ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate) generated during the light-dependent reactions of photosynthesis are used to convert 3-PGA into glyceraldehyde-3-phosphate (G3P). This step requires energy and involves a series of enzymatic reactions.
3. Regeneration:
During the regeneration phase, some of the G3P molecules are used to regenerate RuBP, which is necessary for the continuation of the Calvin cycle. The remaining G3P molecules can be converted into glucose or other organic compounds.
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Which one of the following is represented by Calvin cycle? [1996]a)Reductive carboxylationb)Oxidative carboxylationc)Photophosphorylationd)Oxidative phosphorylation.Correct answer is option 'A'. Can you explain this answer?
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