URGENT urgent please i need final answers of this 4 mcq questions ;

question 1 :

Which of the following statements is not the description of Phase II metabolism?

a) Reactions which add a polar molecule to a functional group already present on a drug or one of its metabolites.

b) It involves electron transfer reaction

c) Reactions which add polar ionized functional group to a drug.

d) It involves nucleophilic electrophilic interaction

question 2

Ordinary competitive inhibition can be recognized by a reversible reaction at the substance binding site with:

a) decrease in Vmax and an apparent decrease in Km.

b) no change in Vmax and an apparent decrease in Km.

c) no change in Vmax and an apparent increase in Km.

d) decrease in Vmax and an apparent increase in Km

question 3

A characteristic that distinguishes true receptors from other drug binding sites present in blood and other biological tissues is the characteristic of:

a) Signal transduction

b) Reversible binding c) Stereoselective interaction

d) Binding affinity

question 4

Which of the following enzymes is not involved in catalysing a Phase II metabolic reaction?

a) Sulfotransferases

b) glucuronyltransferase

c)flavin-containing monooxygenases

d) Transacetylases