To determine the products of the Krebs cycle (also known as the citric acid cycle or TCA cycle) after 1 molecule of glucose goes through glycolysis and then the Krebs cycle, we need to consider the overall process:
- One molecule of glucose is converted into two molecules of pyruvate during glycolysis.
- Each pyruvate enters the mitochondria and is converted into one acetyl-CoA, which then enters the Krebs cycle.
- Each acetyl-CoA that enters the Krebs cycle results in the production of the following:
- 3 NADH
- 1 FADH2
- 1 ATP (or GTP)
- 2 CO2
Since one molecule of glucose produces two acetyl-CoA (one from each pyruvate), the total yield from one glucose molecule would be:
- 6 NADH (3 NADH per acetyl-CoA x 2)
- 2 FADH2 (1 FADH2 per acetyl-CoA x 2)
- 2 ATP (or GTP) (1 ATP per acetyl-CoA x 2)
- 4 CO2 (2 CO2 per acetyl-CoA x 2)
Given these calculations, the correct option from your responses is:
6 NADH, 2 ATP, 4 CO2, and 2 FADH2.