Question

For each of the reactions or products given choose the metabolic pathway or pathways where that reaction occurs or the product is made.
The topic for this problem is aerobic respiration.
Some responses may be used more than once while others may not be used at all.

FAD is reduced to FADH₂

Redox reactions occur

the choices are:

1) Glycolysis
2) Pyruvate Dehydrogenase
3) Krebs Cycle
4) Electron Transport Chain
5) Both Glycolysis and Pyruvate Dehydrogenase
6) Both Glycolysis and Krebs Cycle
7) Both Pyruvate Dehydrogenase and Krebs Cycle
8) Glycolysis, Pyruvate Dehydrogenase, Krebs Cycle
9) Glycolysis, Pyruvate Dehydrogenase, Krebs Cycle and Electron Transport Chain

Answer 1

FAD is reduced to FADH2 in both pyruvate dehydrogenase and kreb's cycle.

The step in which conversion from succinate to fumarate that step converts FAD to FADH2.

Pyruvate dehydrogenase also uses FAD and converts it into FADH2.

So, the correct answer is 7.

Pyruvate dehydrogenase and kreb's cycle.

ETS does not convert FAD to FADH2.

Thus, only 7 is correct.