Review questions for Enzymes 1

Question 1

What do you call the groups which are tightly and stably incorporated into the protein structure by covalent and noncovalent forces?

a. Isoenzymes
b. Cofactors
c. Prosthetic groups
d. Coenzymes

Answer 1

c. Prosthetic groups

Question 2

Enzymes are neither consumed nor permanently altered

a. True
b. False

Answer 2

a. True

Question 3

Enzymes are all of the following except

a. Substrate specific
b. Product specific
c. Catalysts
d. Stereospecific

Answer 3

b. Product specific

Question 4

These enzymes catalyze the cleavage of C-C-, C-O, C-N, and other bonds by elimination, leaving double bonds, and also add groups to double bonds

a. Ligases
b. Isomerases
c. Transferases
d. Lyases

Answer 4

d. Lyases

Question 5

The dynamic changes that accompany substrate binding and catalysis can be explained by the

A. Conformation model
B. Lock and Key Model
C. Induced fit model
D. Changing Substrate model

Answer 5

C. Induced fit model

Question 6

These enzymes catalyze the transfer of PO3- from ATP to a substrate

A. Kinases
B. Mutases
C. Phosphorylases
D. Phosphatases

Answer 6

A. Kinases

Question 7

What do scientists use to measure the rate of single catalytic events?

A. Single molecule enzymology
B. Combinatorial chemistry
C. Immunoassays
D. Spectrophotometry

Answer 7

A. Single molecule enzymology

Question 8

Principal serum enzyme used in diagnosing viral hepatitis

A. ALP
B. Amylase
C. AST
D. ALT

Answer 8

D. ALT

Question 9

Mechanisms to achieve dramatic catalytic enhancement of the rates of chemical reaction, except

A. Catalysis by proximity
B. Catalysis by Strain
C. Acid-Base Catalysis
D. Hydrogenation Catalysis

Answer 9

D. Hydrogenation Catalysis

Question 10

Enzyme that link two molecules via an ATP-dependent reaction

A. Carboxylase
B. Ligase
C. Oxidase
D. Protease

Answer 10

B. Ligase