Which molecule that directly enters the citric acid cycle.
A) acetyl CoA.
B) adenosine diphosphate.
C) citric acid.
D) oxaloacetic acid.
E) pyruvic acid.

Question

Quizplus · Accepted Answer

Acetyl CoA is the molecule that directly enters the citric acid cycle. It combines with oxaloacetate to form citrate and initiates the cycle. Adenosine diphosphate (ADP) is a nucleotide involved in energy transfer, but it does not directly enter the citric acid cycle. Citric acid is an intermediate in the cycle, and pyruvic acid is converted to acetyl CoA before entering the cycle. Oxaloacetic acid is also an intermediate in the cycle, but it does not directly enter the cycle as it is already present in the cycle.

Which Molecule That Directly Enters the Citric Acid Cycle