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MCQs

Total Questions : 133 | Page 9 of 14 pages
Question 81. Which of the following is an example of ligases enzyme?
  1.    Mutases
  2.    Epimerases
  3.    Racemases
  4.    Carboxylases
 Discuss Question
Answer: Option D. -> Carboxylases
Answer: (d).Carboxylases
Question 82. Which of the following function is catalyzed by Racemases?
  1.    Removal of water
  2.    Intramolecular transfer of a functional group
  3.    Interconversion of L and D stereoisomers
  4.    Inversion of asymmetric carbon atom
 Discuss Question
Answer: Option C. -> Interconversion of L and D stereoisomers
Answer: (c).Interconversion of L and D stereoisomers
Question 83. Which of the following reaction is catalyzed by Lyase?
  1.    Breaking of bonds
  2.    Formation of bonds
  3.    Intramolecular rearrangement of bonds
  4.    Transfer of group from one molecule to another
 Discuss Question
Answer: Option A. -> Breaking of bonds
Answer: (a).Breaking of bonds
Question 84. What is the binding energy?
  1.    Free energy released in the formation of enzyme-substrate interaction
  2.    The energy required to form a bond
  3.    The energy required to bind substrate
  4.    It is the activation energy
 Discuss Question
Answer: Option A. -> Free energy released in the formation of enzyme-substrate interaction
Answer: (a).Free energy released in the formation of enzyme-substrate interaction
Question 85. Which of the following is not a catalytic strategy for an enzyme to perform specific reaction?
  1.    Covalent catalysis
  2.    Metal ion catalysis
  3.    Michaelis constant
  4.    Acid-base catalysis
 Discuss Question
Answer: Option C. -> Michaelis constant
Answer: (c).Michaelis constant
Question 86. What is the SI unit of enzyme activity?
  1.    Km
  2.    Kat
  3.    K𝒸ₐₜ
  4.    Vₘₐₓ
 Discuss Question
Answer: Option B. -> Kat
Answer: (b).Kat
Question 87. Which of the following is not an example of irreversible enzyme inhibitor?
  1.    Cyanide
  2.    Sarin
  3.    Diisopropyl phosphoflouridate (DIPF)
  4.    Statin drugs
 Discuss Question
Answer: Option D. -> Statin drugs
Answer: (d).Statin drugs
Question 88. Which of the following is INCORRECT for the lock-and-key model?
  1.    It is used to describe the binding process
  2.    The active site of the enzyme is complementary to the substrate
  3.    It demonstrates enzyme-substrate complex
  4.    The binding of the substrate produces a conformational change in enzyme
 Discuss Question
Answer: Option D. -> The binding of the substrate produces a conformational change in enzyme
Answer: (d).The binding of the substrate produces a conformational change in enzyme
Question 89. Lineweaver-Burk plot is also known as______
  1.    Double reciprocal plot
  2.    Hanes-Woolf plot
  3.    Eadie-Hofstee plot
  4.    Steady-state equation
 Discuss Question
Answer: Option A. -> Double reciprocal plot
Answer: (a).Double reciprocal plot
Question 90. Law of thermodynamics which states that energy can neither be created nor be destroyed is ___________
  1.    The second law of thermodynamics
  2.    Third law of thermodynamics
  3.    First law of thermodynamics
  4.    Zero-order kinetics
 Discuss Question
Answer: Option C. -> First law of thermodynamics
Answer: (c).First law of thermodynamics

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