Question

During glycolysis, the conversion of one mole of $3PGAld$ to $C_3{H}_4{O}_3$ yield $2$ moles of ATP . But the oxidation of glucose to $C_3{H}_4{O}_3$ produces a total of $4$ moles of ATP. Where do the remaining $2$ moles of ATP come from?

• A. One mole of glucose gives $2$ moles of $3PGAld$
• B. Glycolysis produce $2NADH$
• C. Fermentation of $C_3{H}_4{O}_3$ produces $2$ ATP more
• D. 2 ATP are used in conversion of glucose to $3PGAld$

Answer 1

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'.