Question

Role of carbon fixation/Calvin cycle? The ATP needed, starting and ending products and how many cycles are needed to run?

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Answer 1

Ans- The role of calvin cycle is carbon fixation . It uses the product from the light dependent reaction of photosynthesis , to create the organic products that plants required . It converts water & carbon dioxide into glucose .

The starting product of calvin cycle is carbon dioxide , ATP & NADPH produced by light dependent reactions . The end product of the cycle is an energy rich sugar molecule , which is known as glucose.  To produce one glucose molecule , the cycle uses 12 NADPH and 14 ATP molecules .  

1 G3P molecules  contains 3 fixed carbon atoms. So to produce 1 G3P molecule 3 turns are required. 1 turn for each cabon atom . To produce one glucose molecule , which is consist of 2 G3P molecules , 6 turns of the calvin cycle are required.