Question

In the presence of oxygen, Pyruvate is oxidized into:
1) Carbon dioxide 2) Lactic acid
3) Ethanol
4) Oxygen​

Answer 1

Answer:

Oxygen

In the absence of oxygen, pyruvate is converted to lactate, and NADH is reoxidized to NAD+. In the presence of oxygen, pyruvate is converted to acetyl-CoA and then enters the citric acid cycle. More ATP can be formed from the breakdown of glucose when oxygen is present