Question

The number of ATP produced when a molecule of glucose undergoes fermentation is?

• A. $4$
• B. $36$
• C. $2$
• D. $38$

Answer 1

Answer: (C)

$2$

• The chemical breakdown of glucose in the absence of oxygen is called as fermentation. This process is also called anaerobic respiration.
• In this reaction, 2 moles of $ATP$ along with 2 molecules of $NADH$ are generated during the conversion of glucose to pyruvate.
• This pyruvate is then converted into lactic acid at the expenditure of 2 molecules of $NADH$. So the net gain is $2$ $ATP$ molecules.

Thus the correct answer is option C.