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Question: Answered & Verified by Expert
In the hexose monophosphate shunt pathway, the number of CO2 molecules evolved is _________.
BiologyRespiration in PlantsNEET
Options:
  • A same as in glycolysis
  • B less than glycolysis
  • C more than glycolysis
  • D much lesser than glycolysis
Solution:
1617 Upvotes Verified Answer
The correct answer is: more than glycolysis
Carbon dioxide evolved in HMP is higher than glycolysis. In this cycle for every molecule of CO2 released 2 NADPH2 are synthesized. Therefore, the complete oxidation of one glucose molecule would produce 6 CO2 molecules or 6×2=12 NADPH2 molecules.

Since each NADPH2 on its passage through the electron transport chain yields 3ATP, therefore, 12 NADPH2 would yield (12×3)=36 ATP molecules.

Net gain of ATP is 36 -1 = 35 ATP

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