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Question

During glycolysis, the conversion of one mole of 3PGAld to C3H4O3 yield 2 moles of ATP . But the oxidation of glucose to C3H4O3 produces a total of 4 moles of ATP. Where do the remaining 2 moles of ATP come from?
  1. One mole of glucose gives 2 moles of 3PGAld
  2. Glycolysis produce 2NADH
  3. Fermentation of C3H4O3 produces 2 ATP more
  4. 2 ATP are used in conversion of glucose to 3PGAld

A
Glycolysis produce 2NADH
B
One mole of glucose gives 2 moles of 3PGAld
C
Fermentation of C3H4O3 produces 2 ATP more
D
2 ATP are used in conversion of glucose to 3PGAld
Solution
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The correct option is A One mole of glucose gives 2 moles of 3PGAld
Two moles of ATP are produced when one mole of Glyceraldehyde 3 phosphate or 3PGA is converted to pyruvic acid. Glyceraldehyde 3 phosphate is produced from glucose in the first phase of glycolysis. Each mole of glucose produces 2 moles of Glyceraldehyde 3 phosphate, therefore, two moles of 3PGA when converted to pyruvic acid, yield 4 moles of ATP.

So, the correct answer is 'One mole of glucose gives 2 moles of 3 PGAld'.

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