Question

In Krebs cycle formation of

• A. 34 ATP takes place
• B. 38 ATP takes place
• C. 15 ATP from each acetyl-CoA takes place
• D. 12 ATP from each acetyl-CoA takes place

Answer 1

The correct option is D 12 ATP from each acetyl-CoA takes place

In Kreb's cycle,

6 NADH are generated (3 per Acetyl CoA that enters)

2 FADH${}_2$ is generated (1 per Acetyl CoA that enters)

2 ATP are generated (1 per Acetyl CoA that enters)

4 CO${}_2$ are released (2 per Acetyl CoA that enters)

1 NADH= 3 ATP

1 FADH= 2 ATP

Thus, 9+ 2+ 1= 12 ATP