How many electron carrier molecules in total (both NADH and FADH2) have been made from a single glucose after both glycolysis and the Krebs Cycle?

After both glycolysis and the Krebs Cycle, a total of 12 electron carrier molecules have been made from a single glucose molecule. Here's the breakdown:

1. Glycolysis: This process produces 2 NADH molecules per glucose.

2. Krebs Cycle: Each glucose molecule is broken down into 2 pyruvate molecules, and each pyruvate molecule goes through the Krebs Cycle once. Therefore, the Krebs Cycle happens twice per glucose molecule. In each round of the Krebs Cycle, 3 NADH and 1 FADH2 are produced. So, for one glucose molecule, the Krebs Cycle produces 6 NADH and 2 FADH2.

Adding these up, we get a total of 2 NADH (from glycolysis) + 6 NADH (from the Krebs Cycle) + 2 FADH2 (from the Krebs Cycle) = 10 NADH and 2 FADH2, which makes a total of 12 electron carrier molecules.