Question 1
The general mechanism is that an enzyme acts by
A…educing the energy of activation
B.increasing the energy of activation
C.decreasing the pH
D.increasing the pH
Question 2
The coenzyme is
A.often a metal
B.always a protein
C.often a vitamin
D.always an inorganic compound
Question 3
An enzyme that joins the ends of two strands of nucleic acid is
A.polymerase
B.ligase
C.synthetase
D.helicase
Question 4
Which of the following is produced with the combination of apoenzyme and coenzyme?
.A.Holoenzyme
B.Enzyme substrate complex
C.Prosthetic group
D.Enzyme product complex
Question 5
An example of competitive inhibition of an enzyme is the inhibition of
A.succinic dehydrogenase by malonic acid
B.cytochrome oxidase by cyanide
C.hexokinase by glucose-6-phosphate
D.carbonic anhydrase by carbon dioxide
Question 6
Blocking of enzyme action by blocking its active sites is
A.allosteric inhibition
B.feedback inhibition
C.competitive inhibition
D.non-competitive inhibition
Question 7
Diastase takes part in digestion of ______.
A.Protein
B.Starch
C.Amino acids
D.Fat
Question 8
Enzyme catalyzing rearrangement of atomic groupings without altering molecular weight or number of atoms is
A.ligase
B.isomerase
C.oxidoreductase
D.hydrolase
Question 9
Enzyme complex involved in alcoholic fermentation is
A.Zymase
B.Invertase
C.Lipase
D.Amylase
Question 10
Zymogen or proenzyme is a
A.Modulator
B.Vitamin
C.Enzyme precursor
D.Hormone
Question 11
Enzymes are basically made up of
A.Fats
B.Proteins
C.Nucleic acids
D.Vitamins
Question 12
Catalysts are different from enzymes in
A.functional at high temperature
B.not used up in reaction
C.being proteinaceous
D.having high rate diffusion
Question 13
Enzymes are polymers of
A.Hexose sugar
B.Amino acids
C.Fatty acids
D.Inorganic phosphate
Question 14
The enzyme which hydrolyses starch to maltose is
A.protease
B.amylase
C.lactase
D.maltase
Question 15
Value needed for enzyme action is ______.
A.Low Km
B.Low Ki
C.High Km
D.High Ki