A online test of MCQs (Multiple Choice Questions) on “Enzyme“. Quiz No. 1
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Enzyme: MCQs Quiz - 1
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Question 1 |
The general mechanism is that an enzyme acts by
reducing the energy of activation | |
increasing the energy of activation | |
decreasing the pH | |
increasing the pH |
Question 2 |
The coenzyme is
often a metal | |
always a protein | |
often a vitamin | |
always an inorganic compound |
Question 3 |
An enzyme that joins the ends of two strands of nucleic acid is
polymerase | |
ligase | |
synthetase | |
helicase |
Question 4 |
Which of the following is produced with the combination of apoenzyme and coenzyme?
Holoenzyme | |
Enzyme substrate complex | |
Prosthetic group | |
Enzyme product complex |
Question 5 |
An example of competitive inhibition of an enzyme is the inhibition of
succinic dehydrogenase by malonic acid | |
cytochrome oxidase by cyanide | |
hexokinase by glucose-6-phosphate | |
carbonic anhydrase by carbon dioxide |
Question 6 |
Blocking of enzyme action by blocking its active sites is
allosteric inhibition | |
feedback inhibition | |
competitive inhibition | |
non-competitive inhibition |
Question 7 |
Diastase takes part in digestion of ______.
Protein | |
Starch | |
Amino acids | |
Fat |
Question 8 |
Enzyme catalyzing rearrangement of atomic groupings without altering molecular weight or number of atoms is
ligase | |
isomerase | |
oxidoreductase | |
hydrolase |
Question 9 |
Enzyme complex involved in alcoholic fermentation is
Zymase | |
Invertase | |
Lipase | |
Amylase |
Question 10 |
Zymogen or proenzyme is a
Modulator | |
Vitamin | |
Enzyme precursor | |
Hormone |
Question 11 |
Enzymes are basically made up of
Fats | |
Proteins | |
Nucleic acids | |
Vitamins |
Question 12 |
Catalysts are different from enzymes in
functional at high temperature | |
not used up in reaction | |
being proteinaceous | |
having high rate diffusion |
Question 13 |
Enzymes are polymers of
Hexose sugar | |
Amino acids | |
Fatty acids | |
Inorganic phosphate |
Question 14 |
The enzyme which hydrolyses starch to maltose is
protease | |
amylase | |
lactase | |
maltase |
Question 15 |
Value needed for enzyme action is ______.
Low Km | |
Low Ki | |
High Km | |
High Ki |
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There are 15 questions to complete.
i think 12 th question’s answer is 1 why it is given option 2 ? can u explain me this
sir viruses do have enzymes i.e lysomzymes could you explain me this