Essential Biochemistry - Protein Metabolism (Section 5 - No. 41)

Which of the following statements is correct regarding the catabolism of the carbon skeletons of amino acids?

All amino acids are converted to glucose.

All amino acids are converted to acetyl-CoA.

Amino acids can be converted to either glucose or ketone bodies.

Amino acids are not involved in energy metabolism.

Amino acids are degraded to give either pyruvate, acetyl-CoA, or intermediates of the citric acid cycle.