Question

Give an account of Calvin cycle.

Answer 1

calvin cycle is a set of chemical reactions that take place in the chloroplasts during photosynthesis.
this cycle is light independent.
And also known as the Benson-Calvin cycle.


hope mate it's helpful to you;-

Answer 2

Calvin cycle occurs in all plants. There are three stages:

•Carboxylation - It is process of the fixation of CO2 into an organic compound. Carboxylation is the most crucial step. CO2 helps in carboxylation of RuBP. This reaction is catalysed by the enzyme RuBisCO. The product formed is Triose phosphate OR 3-PGA OR 3-Phosphoglycerate.

•Reduction - It is a series of reactions that lead to the formation of a glucose molecule. In one turn of the cycle, 1 CO2 gets fixed. So to form C6H12O6, 6 turns of the cycle are required so that 6 CO2 get fixed, after which, the fixed 6 CO2 may be reduced to form 1 glucose molecule during reduction. But, for each turn of the cycle, reduction requires 2 molecules of ATP and 2 of NADPH.

•Regeneration - The intermediate product formed after reduction if phosphorylised, will form RuBP. To let the cycle continue, this is important. And thus, for the phosphorylation to 1 RuBP, 1 ATP molecule is required.