AP BIOLOGY

Detailed explanation-1: -To produce 3 glucose molecules 54 ATP and 36 NADPH2 molecules are required.

Detailed explanation-2: -For one turn: ATP used = 3 molecules NADPH used = 2 molecules Thus for six cycles : ATP used = 3*6 = 18 molecules NADPH used = 2*6 = 12 molecules Therefore total ATP and NADPH required to produce one molecule of glucose is 18 and 12 respectively.

Detailed explanation-3: -In the second stage, six ATP and six NADPH are used to convert the six 3-PGA molecules into six molecules of a three-carbon sugar (G3P).

Detailed explanation-4: -Products of C3 Cycle 3 ATP and 2 NADPH molecules are used during the reduction of 3-phosphoglyceric acid to glyceraldehyde-3 phosphate and in the regeneration of RuBP. 18 ATP and 12 NADPH are consumed in the production of 1 glucose molecule.