Question

The two electrons in can be used to synthesize 2.5 ATPs in the ETC. A. NADH

B. FADH2
C. Cytochrome c
D. ATP synthase

Answer 1

In the electron transport chain, both NADH and FADH2 contribute to the synthesis of ATP. However, the electrons from FADH2 produce about two ATP, while the electrons from NADH produce about three ATP.

Step-by-step explanation:

In the electron transport chain (ETC), both NADH and FADH2 contribute to the synthesis of ATP. However, the electrons from NADH produce about three ATP, while the electrons from FADH2 produce about two ATP. This difference is because the electrons from FADH2 enter the ETC at a lower point than the electrons from NADH.

During the ETC, NADH donates its electrons at Complex I and then proceeds to Complexes III and IV, while FADH2 donates its electrons at Complex II before moving to Complexes III and IV.

Therefore, the correct answer to the question is B. FADH2.