The Krebs cycle forms many products. Which option lists the correct products of the Krebs cycle after 1 molecule of glucose goes through it?(1 point)

Question

Responses

net 4 NADH, 4 ATP, 8 CO2, 4 FADH2
net 4 N A D H , 4 A T P , 8 C O sub 2 , 4 F A D H sub 2

net 1 NADH, 1 ATP, 2 CO2, 1 FADH2
net 1 N A D H , 1 A T P , 2 C O sub 2 , 1 F A D H sub 2

6 NADH, 2 ATP, 4 CO2, and 2 FADH2
6 N A D H , 2 A T P , 4 C O sub 2 , and 2 F A D H sub 2

net 2 NAD+, 2 ATP, 4 CO2, 2 FADH

Answer 1

The correct response for the products of the Krebs cycle (also known as the citric acid cycle or TCA cycle) generated from one molecule of glucose is:

net 6 NADH, 2 ATP, 4 CO2, and 2 FADH2

This is because one molecule of glucose yields two acetyl-CoA molecules (since one glucose = two pyruvate after glycolysis), and each turn of the Krebs cycle produces these amounts. As a result, over two cycles (for the two acetyl-CoA), the total products will be:

• 6 NADH (3 per cycle x 2 cycles)
• 2 ATP (1 per cycle x 2 cycles)
• 4 CO2 (2 per cycle x 2 cycles)
• 2 FADH2 (1 per cycle x 2 cycles)

So the last option is correct.