Calvin Cycle SIMPLIFIED......

1)Each turn of the Calvin cycle “fixes” one molecule of carbon that can be used to make sugar.

2)It takes three turns of the Calvin cycle to create one molecule of glyceraldehyde-3 phosphate.

3)After six turns of the Calvin cycle, two molecules of glyceraldehyde-3 phosphate can be combined to make a glucose molecule.

4)Each turn of the Calvin cycle also uses up 3 ATP and 2 NADPH in the processes of reducing (adding electrons to) 3-phosphoglyceric acid to produce glyceraldehyde-3 phosphate, and regenerating RuBP so that they can accept a new atom of carbon from CO2 from the air.

5)This means that to produce a single molecule of glucose, 18 ATP and 12 NADPH are consumed.

6)We know that each NADPH is equal to 3 ATP.So 18 ATP + 3× 12 ATP= 18 + 36=54 ATP

So 54 ATP ARE PRODUCED FROM A SINGLE MOLECULE OF GLUCOSE.

Hope this helps!!!!!!