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Define Michaelis constant (km) of an enz...

Define Michaelis constant (km) of an enzyme.

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**Step-by-Step Solution:** 1. **Definition of Michaelis Constant (Km):** - The Michaelis constant, denoted as Km, is a key parameter in enzyme kinetics. 2. **Substrate Concentration:** - Km represents the substrate concentration at which the rate of the enzyme-catalyzed reaction reaches half of its maximum velocity (Vmax). ...
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Knowledge Check

  • The Michaelis constant K_(m) is

    A
    Numerically equal to `1/2V_(max)`
    B
    Dependent on the enzyme concentration
    C
    Numerically equal to the substrate concentration that gives half maximal velocity
    D
    Increased in the presence of non-competitive inhibitor

  • Michaelis constant (K_(m)) value of enzyme is substrate concentration at which velocity of reaction is

    A
    `v_(max)`
    B
    One third `v_(max)`
    C
    Half `v_(max)`
    D
    One fifth `v_(max)`

  • Michaelis constant K_(m) is equla to

    A
    `(K_(1))/(K_(2)-K_(3))`
    B
    `(K_(1)+K_(2))/(K_(1))`
    C
    `(K_(2)-K_(3))/(K_(1))`
    D
    `(K_(1)-K_(2))/(K_(3))`

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    Which of the following statements about Michaelis-Menten kinetics is correct? I. A high Michaelis constant ( K_(m) ) indicates a high affinity of an enzyme for its substrate. II. A low Michaelis constant ( K_(m) ) indicates a high affinity of an enzyme for its substrate. III. The Michaelis constant ( K_(m) ) of an enzyme increases when the enzyme concentration is increased. IV. The Michaelis constant ( K_(m) ) of an enzyme is unchanged when the enzyme concentration is increased.

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