Which of the Following Statements Regarding the General Concepts of Metabolism

Question

Which of the following statements regarding the general concepts of metabolism is true?
A)once glucose is converted to pyruvate,there is no way to convert pyruvate back to glucose
B)when triacylglycerols are used as fuel,only the fatty acids can be metabolized,the glycerol is a waste product
C)amino acids serve as substrates for many pathways including glycolysis and the citric acid cycle
D)the citric acid cycle is generally considered an anabolic pathway while gluconeogenesis is generally considered a catabolic pathway
E)none of the above

Accepted Answer

Amino acids can serve as substrates for many metabolic pathways, including glycolysis and the citric acid cycle. This is because amino acids can be broken down to intermediates that feed into these pathways, such as pyruvate and acetyl-CoA. Therefore, amino acids can be used for both energy production and biosynthesis. Statements A, B, and D are false.