Question

The K${}_m$ value of the enzyme is the value of the substrate concentration at which the reaction reaches to

• A. zero
• B. 2 $V_{max}$
• C. $\frac{1}{2}{V}_{max}$
• D. $\frac{1}{2}{V}_{max}$

Answer 1

The correct option is C $\frac{1}{2}{V}_{max}$

K${}_m$ or the Michaelis- Menten constant refers to the concentration of substrate at which the reaction reaches half its maximum velocity. The constant was given by Leonor Michaelis and Man Menten in 1913. It tells about the affinity of the substrate to the enzyme and the catalytic activity of the enzyme.