Enzymes Regulation(Microbiology ) Questions and Answers

Question 1. Allosteric enzymes are
  1.    larger and more complex than simple enzyme
  2.    smaller than simple enzyme
  3.    larger than simple enzyme
  4.    smaller than simple enzyme but not complex
Explanation:-
Answer: Option A. -> larger and more complex than simple enzyme
Question 2. Isozymes or iso enzymes are those enzyme which
  1.    have different structural forms but identical catalytic properties
  2.    have same structural forms
  3.    catalyses oxidation reactions
  4.    none of these
Explanation:-
Answer: Option A. -> have different structural forms but identical catalytic properties
Question 3. Intracellular enzymes
  1.    only provide energy to the cell
  2.    synthesize cellular material and perform catabolic reaction
  3.    synthesize cellular material only
  4.    synthesize cellular material and perform anabolic reaction
Explanation:-
Answer: Option B. -> synthesize cellular material and perform catabolic reaction
Question 4. Main function of an enzyme is to
  1.    maintain constant activation energy
  2.    decrease the activation energy
  3.    increase the activation energy
  4.    none of these
Explanation:-
Answer: Option B. -> decrease the activation energy
Question 5. Enzyme catalase has non-protein metal as
  1.    iron
  2.    zinc
  3.    magnesium
  4.    manganese
Explanation:-
Answer: Option A. -> iron
Question 6. Many enzymes consists of a protein combined with low molecular weight organic molecule called as
  1.    co-enzyme
  2.    apoenzyme
  3.    co-factors
  4.    holoenzyme
Explanation:-
Answer: Option A. -> co-enzyme
Question 7. The inactive organic molecular portion of enzyme is
  1.    apoenzyme
  2.    holoenzyme
  3.    none of these
  4.    coenzyme
Explanation:-
Answer: Option D. -> coenzyme
Question 8. Organic molecules that increase the rate of metabolic reactions with themselves changing are known as
  1.    reactants
  2.    coenzymes
  3.    substrates
  4.    enzymes
Explanation:-
Answer: Option D. -> enzymes
Question 9. The inactive protein from of enzyme is
  1.    enzyme
  2.    apoenzyme
  3.    haloenzyme
  4.    cofactor
Explanation:-
Answer: Option B. -> apoenzyme
Question 10. Who coined the word enzyme first?
  1.    Liebig
  2.    Buchner
  3.    Kuhne
  4.    Pasteur
Explanation:-
Answer: Option C. -> Kuhne
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