Question

The substrate concentration at which an enzyme-catalyzed reaction proceeds at one-half of its velocity is called:

• A. \(k_{cat}\)
• B. \(k_{a}\)
• C. \(V_{0}\)
• D. \(V_{max}\)

Hint:

Km = substrate concentration at Vmax/2, a measure of enzyme efficiency.

Answer 1

The Correct Option is B

The Michaelis constant (\(K_m\)) is defined as the substrate concentration at which the reaction velocity reaches half of \(V_{max}\). It reflects the enzyme’s affinity for its substrate.