Question

__________ enters the TCA cycle and forms NADH and FADH2, which can then be used for ATP production.

A) Acetyl CoA
B) Glucose
C) Pyruvate
D) A fatty acid chain

Answer 1

Acetyl CoA enters the TCA cycle and forms NADH and FADH2, which can be used for ATP production.

Step-by-step explanation:

The correct answer is A) Acetyl CoA. Acetyl CoA enters the TCA cycle (also known as the citric acid cycle or Krebs cycle) by combining with a four-carbon molecule called oxaloacetate, forming a six-carbon molecule called citrate. This cycle involves a series of reactions that ultimately oxidize the acetyl group of Acetyl CoA to produce carbon dioxide and water. Along with this oxidation process, NADH and FADH2 molecules are formed, which can then be used in the electron transport chain for ATP production.