A Young Animal Has Never Had Much Energy

question 62

Multiple Choice

A young animal has never had much energy. He is brought to a veterinarian for help and is sent to the animal hospital for some tests. There they discover his mitochondria can use only fatty acids and amino acids for respiration, and his cells produce more lactate than normal. Of the following, which is the best explanation of his condition?

• A) His mitochondria lack the transport protein that moves pyruvate across the outer mitochondrial membrane.
• B) His cells cannot move NADH from glycolysis into the mitochondria.
• C) His cells contain something that inhibits oxygen use in his mitochondria.
• D) His cells lack the enzyme in glycolysis that forms pyruvate.
• E) His cells have a defective electron transport chain, so glucose goes to lactate instead of to acetyl CoA.

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