Answer to Question #262889 in Biochemistry for Valarie

Question #262889

The velocity of an enzyme-catalyzed reaction that follows Michaelis-Menten kinetics was

measured at several substrate concentrations (shown below).

i. Calculate 𝐾M and Vπ‘šπ‘Žπ‘₯ from the data given.

ii. Determine KM and Vmax

iii. The second set of velocities represent the rate of the reaction when an inhibitor is

added. Plot these on the same graph as the first and determine KM and Vmax

iv. What type of inhibitor is it?

[S](M) V0 (ΞΌM/min) V(+ inhibitor)

0.00006 6.66 4

0.0001. 9.30 3

0.002. 15 6

0.006 22.03 8

0.08 29 9

0.2. 35.6 10.6

Expert's answer

Vmax is the maximal rate of the reaction. [Substrate] is the concentration of the substrate. Km is the Michaelis-Menten constant which shows the concentration of the substrate when the reaction velocity is equal to one half of the maximal velocity for the reaction.

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