Q.16   The inhibitors that bind tightly and permanently to enzymes and destroy their globular structure 
and catalytic activity are
A) Reversible inhibitors         C) Competitive inhibitors
B) Irreversible inhibitors         D) Non-competitive inhibitors
Q.17   Enzyme succinate dehydrogenase converts succinate into
A) Malate             C) Citrate
B) Malonic acid           D) Fumarate
Q.18   If the detachable co-factor is an inorganic ion then it is designated as
A) Coenzyme            C) Holoenzyme
B) Prosthetic group           D) Activator
Q.19  ______ is most abundant carbohydrate in nature.
A) Waxes             C) Starch
B) Glycerol             D) Cellulose
Q.20  Which of the following is a keto sugar:
A) Glyceraldehyde           C) Ribose
B) Dihydroxy-acetone         D) Glucose