The Calvin cycle uses six ATP molecules to produce one 3-carbon sugar (glyceraldehyde-3-phosphate, 3GP) from three molecules of RuBP and three molecules of carbon dioxide. Yet the Calvin cycle actually requires nine ATP molecules to function. Why?

+1 vote

 

  

Three additional ATP molecules are hydrolyzed to keep enough heat available for the reaction to continue.

  

Three additional ATP molecules are used to phosphorylate carbon dioxide for the next cycle.

  

Three additional ATP molecules are used to regenerate RuBP.

  

Three additional ATP molecules are used to reduce NADP+ to NADPH.

 

asked Dec 25, 2012 in Biology by anonymous
    

1 Answer

0 votes

 

Three additional ATP molecules are used to regenerate RuBP.

 

answered Dec 25, 2012 by anonymous

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