Question

Match each of the following terms from the Michaelis-Menten equation to its correct definition.

1) V max A) numerically equal to the substrate concentration at 0.5 V max
2) k cat B) rate of a reaction when enzyme is saturated with substrate
3) k cat/K M C) enzyme efficiency
4) K M D) number of substrate molecules turned over by enzyme
a. 1:C; 2:D; 3:A; 4:B
b. 1:B; 2:C; 3:D; 4:A
c. 1:D; 2:B; 3:A; 4:C
d. 1:B; 2:D; 3:C; 4:A

Answer 1

d. 1:B; 2:D; 3:C; 4:A

Step-by-step explanation:

The Michaelis-Menten equation is:

`V_(0)=V_(max)([substrate])/([substrate]+K_(m))`

Also

`V_(0)=K_(cat)E_(0)([substrate])/([substrate]+K_(m))`

Where

Kcat = turn over number [ number of substrate molecules turned over by enzyme]

Vmax = Maximum rate (rate of a reaction when enzyme is saturated with substrate)

Km = is the substrate concentration when the V is numerically equal to half of Vmax

Kcat / Km = Enzyme efficiency.