1) Assuming that P50=26 torrs, under conditions where pO2=30 torrs, the average number of O2 molecules bound per hemoglobin is closest to

A. 0.5
B. less than 1
C. almost 2
D. greater than 2
E. greater than 3


The answer is greater than 2, could someone explain this as I have no clue what this question is about.....


2) For a reaction catalyzed by an enzyme with a Km=1mM, which of the following represents the effect on the velocity if [S] is changed from 10mM to20mM? (Assume that the enzyme obeys Michaelis-Menten Kinetics).

A. Small decrease
B. Small increase
C. Twofold decrease
D. Twofold increase
E. Twentyfold increase

anyone guys...........???

2) For a reaction catalyzed by an enzyme with a Km=1mM, which of the following represents the effect on the velocity if [S] is changed from 10mM to20mM? (Assume that the enzyme obeys Michaelis-Menten Kinetics).

A. Small decrease
B. Small increase
C. Twofold decrease
D. Twofold increase
E. Twentyfold increase

V = Vmax * [S] / [S] + Km

When [S] is 10
V = Vmax [10] / 10 + 1 V = Vmax (0.90)

When [S] is 20:
V= Vmax [20] / 20 + 1 V= vmax (0.95)

The velocity of the reaction had a small increse. {B}

V = Vmax * [S] / [S] + Km

When [S] is 10
V = Vmax [10] / 10 + 1 V = Vmax (0.90)

When [S] is 20:
V= Vmax [20] / 20 + 1 V= vmax (0.95)

The velocity of the reaction had a small increse. {B}


Hey thnx a lot, I really appreciate the explanation :-)

Hey thnx a lot, I really appreciate the explanation :-)


your welcome :D