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MCQs

Total Questions : 178 | Page 5 of 18 pages
Question 41. Allosteric enzymes consist of multiple
  1.    inhibitors
  2.    polypeptide chains
  3.    active sites
  4.    temperature ranges
 Discuss Question
Answer: Option B. -> polypeptide chains
Answer: (b).polypeptide chains
Question 42. Competitive inhibitors and real substrate often have similar
  1.    structure
  2.    chemical properties
  3.    physical properties
  4.    Mechanism of action
 Discuss Question
Answer: Option A. -> structure
Answer: (a).structure
Question 43. The nonsubstrate molecules that binds to the allosteric sites are called as
  1.    inhibitors
  2.    reactants
  3.    allosteric substrate
  4.    allosteric modulators
 Discuss Question
Answer: Option D. -> allosteric modulators
Answer: (d).allosteric modulators
Question 44. Competitive inhibition can be overcome by using
  1.    low concentration of substrate
  2.    high concentration of substrate
  3.    high concentration of inhibitor
  4.    moderate concentration of inhibitor
 Discuss Question
Answer: Option B. -> high concentration of substrate
Answer: (b).high concentration of substrate
Question 45. In competitive inhibition, the two things that binds to enzyme active site are
  1.    substrate
  2.    inhibitor
  3.    catalyst
  4.    both a and b
 Discuss Question
Answer: Option D. -> both a and b
Answer: (d).both a and b
Question 46. Enzyme-catalyzed modifications are
  1.    reversible
  2.    irreversible
  3.    Physical change in enzyme
  4.    both a and b
 Discuss Question
Answer: Option C. -> Physical change in enzyme
Answer: (c).Physical change in enzyme
Question 47. Transmethylases helps in transfer of
  1.    methyl group
  2.    ethyl group
  3.    amino group
  4.    acetyl group
 Discuss Question
Answer: Option A. -> methyl group
Answer: (a).methyl group
Question 48. Irreversible modifications require the synthesis of
  1.    enzymes
  2.    carbohydrates
  3.    vitamins
  4.    proteins
 Discuss Question
Answer: Option D. -> proteins
Answer: (d).proteins
Question 49. Enzyme which helps in changing the shape of molecule is called
  1.    ligases
  2.    dehydrogenases
  3.    hydrolases
  4.    isomerases
 Discuss Question
Answer: Option D. -> isomerases
Answer: (d).isomerases
Question 50. Covalent modification is means of changing
  1.    chemical properties
  2.    physical properties
  3.    bonding on amino acids
  4.    pH of amino acids
 Discuss Question
Answer: Option A. -> chemical properties
Answer: (a).chemical properties

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