High Levels of Citric Acid Inhibit the Enzyme Phosphofructokinase, a Key

question 3

Multiple Choice

High levels of citric acid inhibit the enzyme phosphofructokinase, a key enzyme in glycolysis. Citric acid binds to the enzyme at a different location from the active site. This is an example of ________.

• A) competitive inhibition
• B) allosteric regulation
• C) the specificity of enzymes for their substrates
• D) positive feedback regulation

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