Question

multiple choice question
the bacterial enzyme pyruvate dehydrogenase contains multiple copies of each of three enzymes for a total of 60 protein subunits. this is an example of

• a multi - stage enzyme
• a multienzyme complex
• coupled enzymes

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Explanation:

A multienzyme complex consists of multiple copies of several enzymes working together. Here, the bacterial enzyme pyruvate dehydrogenase has multiple copies of three enzymes, fitting the definition of a multienzyme complex. A multi - stage enzyme is not a standard term in this context. Coupled enzymes are enzymes whose reactions are linked in a metabolic pathway, which is not the case described here.

Answer:

B. a multienzyme complex