BIO NMDCAT ENZYMES

nmdcat.online July 11, 2026

In the context of enzyme kinetics, the Michaelis constant (Km) is numerically equal to the

A. Maximum velocity the enzyme can achieve

B. Substrate concentration at which the reaction velocity is half of Vmax

✓

C. Enzyme concentration required for half-maximal activity

D. Turnover number of the enzyme

📝 Explanation

Km is a measure of an enzyme's affinity for its substrate, defined as the substrate concentration at which the reaction rate is one-half of the maximum velocity (Vmax).

📖 Additional Information

Maximum velocity the enzyme can achieve
Substrate concentration at which the reaction velocity is half of Vmax
Enzyme concentration required for half-maximal activity
Turnover number of the enzyme

Km is a measure of an enzyme's affinity for its substrate, defined as the substrate concentration at which the reaction rate is one-half of the maximum velocity (Vmax).

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