A Series of Enzymes Catalyse the Reactions in the Metabolic

question 7

Multiple Choice

A series of enzymes catalyse the reactions in the metabolic pathway X → Y → Z → A. Product A binds to the enzyme that converts X to Y at a position remote from its active site. This binding decreases the activity of the enzyme. With respect to the enzyme that converts X to Y, substance A functions as ________.

• A) an allosteric inhibitor
• B) the substrate
• C) an intermediate
• D) a competitive inhibitor

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