Question

The diagram on the right shows the catabolic pathway for Lysine.

Which of the following is true according to the diagram?
a. Lysine is a ketogenic amino acid.
b. Lysine catabolism contributes to glycolysis.
c. Lysine is both ketogenic and glucogenic.
d. Lysine is glucogenic.
e. Lysine cannot be used to produce ATP.

Answer 1

According to the diagram, Lysine is both ketogenic and glucogenic.

Step-by-step explanation:

The diagram shows the catabolic pathway for Lysine. According to the diagram, Lysine is both ketogenic and glucogenic. This means that lysine can be converted into both ketone bodies and glucose. Amino acids that can degrade to pyruvate or oxaloacetate, which can form glucose, are called glucogenic amino acids. Amino acids that degrade to acetyl-CoA or acetoacetic acid, which can be used for the synthesis of ketone bodies, are called ketogenic amino acids