Km of enzyme is:

MCQ

K_m of enzyme is:

A
The substrate concentration at 1/2 of maximum velocity of enzyme action.
B
The substrate concentration at maximum velocity of enzyme action.
C
Half of maximum velocity of enzyme at unit substrate concentration at infinite velocity of enzyme action.
D
Substrate concentration at infinite velocity of enzyme action.

✓

Answer

Explanation:

The Michaelis Menten constant is the substrate concentration at which the reaction rate is one half the maximum.

The K_m describes the affinity of enzyme for a substrate molecule.

Greater the affinity lower is the K_m value and sooner the V_max can be attained and vice versa.

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$\text{CH}_3\text{CH}_2-\text{CH}-\text{OH}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$
$\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3 \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ |\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \\\text{CH}_3\text{CH}_2-\text{C}-\text{OH}\\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ | \\ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \ \text{CH}_3$

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