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MCQs

Total Questions : 65 | Page 3 of 7 pages
Question 21. It would be useful if enzyme catalyzed reactions where performed in organic solvents, other than water.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 22. ___________ are used to immobilize the enzyme to the aqueous phase allowing its separation from product-containing organic phase.
  1.    Centrifuge
  2.    Chromatography
  3.    Phase separators
  4.    Ultrasonicator
 Discuss Question
Answer: Option C. -> Phase separators
Answer: (c).Phase separators
Question 23. Under normal physiological conditions, which of the following enzymes catalyze the degradation of polymers?
  1.    Transferases
  2.    Isomerases
  3.    Hydrolases
  4.    Ligases
 Discuss Question
Answer: Option C. -> Hydrolases
Answer: (c).Hydrolases
Question 24. Pick the odd one out.
  1.    Molecular oxygen
  2.    Steroids
  3.    Oestrogens
  4.    Lipids
 Discuss Question
Answer: Option C. -> Oestrogens
Answer: (c).Oestrogens
Question 25. Polymerization of phenols is catalyzed by ____________ enzyme.
  1.    peroxidase
  2.    penicillinase
  3.    lysozyme
  4.    ribonucleases
 Discuss Question
Answer: Option A. -> peroxidase
Answer: (a).peroxidase
Question 26. One major factor that must be addressed for the use of biphasic systems in many enzyme-catalyzed reactions is ____________
  1.    solvent polarity
  2.    inactivation of the enzyme
  3.    stability of the enzyme
  4.    partition coefficient
 Discuss Question
Answer: Option C. -> stability of the enzyme
Answer: (c).stability of the enzyme
Question 27. In biphasic systems, the limited amount of water available considerably reduces the rate of thermoinactivation.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 28. Due to organic phase in biphasic system, the most important factor in the balance between stabilization and inactivation is ______________
  1.    solvent polarity
  2.    inactivation of the enzyme
  3.    stability of the enzyme
  4.    partition coefficient
 Discuss Question
Answer: Option A. -> solvent polarity
Answer: (a).solvent polarity
Question 29. What does the following equation represent?
\(Log \,P=Log_{10} (\frac{[Material_{octanol}]}{[Material_{water}]})\)
  1.    Solvent polarity
  2.    Kₘ
  3.    pH
  4.    Ionic strength
 Discuss Question
Answer: Option A. -> Solvent polarity
Answer: (a).Solvent polarity
Question 30. Which of the following factor is not important for making the choice of organic solvents in biphasic system?
  1.    Solvent polarity
  2.    Ease of recovery
  3.    Reproducible and linear
  4.    Specific inhibitory effects
 Discuss Question
Answer: Option C. -> Reproducible and linear
Answer: (c).Reproducible and linear

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