Question

How does the absence of acetyl-CoA impact the Electron Transport Chain (ETC)?

A) Increases the rate of ATP production
B) Decreases the rate of ATP production
C) Halts the flow of electrons in the ETC
D) Stimulates the synthesis of NADH

Answer 1

The absence of acetyl-CoA decreases the rate of ATP production in the Electron Transport Chain (ETC).

Step-by-step explanation:

The absence of acetyl-CoA impacts the Electron Transport Chain (ETC) by decreasing the rate of ATP production (option B). Acetyl-CoA is produced from pyruvate and enters the citric acid cycle, where it generates NADH and FADH2. These molecules donate electrons to the ETC, which is an essential step for ATP synthesis through chemiosmosis. Without acetyl-CoA, the ETC cannot receive a sufficient supply of electrons to drive ATP production efficiently.