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Mode of Enzyme Action

60 questions found

Practice Questions

The lock and key model, proposed by Emil Fischer, describes enzyme substrate interaction as

A. A flexible active site
B. A rigid, pre shaped active site complementary to the substrate
C. Random collision followed by substrate change
D. Substrate changes enzyme primary structure
nmdcat.online BIO NMDCAT
Jul 11, 2026

A key limitation of the lock and key model is its inability to explain

A. High substrate specificity
B. Dependence of reaction rate on substrate concentration
C. Ability of the enzyme to stabilize the transition state
D. Formation of enzyme substrate complex
nmdcat.online BIO NMDCAT
Jul 11, 2026

The induced fit model proposed by Daniel Koshland suggests that the active site

A. Is permanently complementary to the product
B. Undergoes conformational change upon substrate binding
C. Is always rigid
D. Is located on a separate regulatory subunit
nmdcat.online BIO NMDCAT
Jul 11, 2026
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