Explain the specific role/function of the Calvin Cycle in photosynthesis.

Expert Solution

The main role of calvin cycle is to convert carbondioxide and water into glucose .The function of calvin cycle is to made organic material that plants need using the product from the light reaction of photosynthesis .

The calvin cycle can be understand in three stages :-

1. Carboxylation - fixation of carbondioxide into a stable organic intermediate . Here carbondioxide is utilised for the carboxylation of RuBP catalysed by RuBP carboxylase which form two molecule of 3 phosphoglycerate.

2. Reduction - it utilises two ATP for phosphorylation and two NADPH for reduction per carbondioxide molecule fixed . The fixation of six molecule of carbondioxide and six turns of the cycle are required for the removal of one molecule of glucose .

3. Regeneration - regeneration of carbondioxide acceptor molecule RuBP is crucial if the cycle is to continue uninterrupted . It require one ATP for phospholyration to form RuBP.

Here for every carbondioxide molecule entering the calvin cycle , three molecule of ATP and two NADPH are required .

gladiator answered 2 years ago

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