Q. . . . . . . . . technique is nothing but a cold or psychrophilic shock.

  • (A) Ultrasonication
  • (B) Homogenization
  • (C) Freezing
  • (D) Alkali treatment
πŸ’¬ Discuss
βœ… Correct Answer: (C) Freezing

Q. Selective degradation of single stranded DNA is carried out by the enzyme

  • (A) Nuclease
  • (B) Ribonuclease
  • (C) SI nuclease
  • (D) Deoxy ribonuclease
πŸ’¬ Discuss
βœ… Correct Answer: (C) SI nuclease

Q. Which of the following belongs to the class of isomerases?

  • (A) Aldolases
  • (B) Oxygenases
  • (C) Epimerases
  • (D) Esterases
πŸ’¬ Discuss
βœ… Correct Answer: (C) Epimerases

Q. The enzyme that adds mononucleotide triphosphates to the 3' OH group of a DNA fragment is

  • (A) Polynucleotide kinase
  • (B) Terminal nucleotidyl transferase
  • (C) Terminal phosphoryl transferase
  • (D) All of these
πŸ’¬ Discuss
βœ… Correct Answer: (B) Terminal nucleotidyl transferase

Q. . . . . . . . . is responsible for maintaining biologically native structure of an enzyme and even nucleic acid.

  • (A) pH
  • (B) Proton
  • (C) ATP
  • (D) Electrons
πŸ’¬ Discuss
βœ… Correct Answer: (B) Proton

Q. . . . . . . . . mediates the synthetic and degradative reactions carried out by living organism.

  • (A) Cofactor
  • (B) Coenzyme
  • (C) Enzymes
  • (D) Vitamins
πŸ’¬ Discuss
βœ… Correct Answer: (C) Enzymes

Q. Which one among them is the example of competitive inhibition of an enzyme:

  • (A) Succinic dehydrogenase by malonic acid
  • (B) Cytochrome oxidase by cyanide
  • (C) Hexokinase by glucose-6-phosphate
  • (D) Carbonic anhydrase by carbon dioxide
πŸ’¬ Discuss
βœ… Correct Answer: (A) Succinic dehydrogenase by malonic acid

Q. Major drawback of utilizing enzymes is . . . . . . . .

  • (A) High productivity
  • (B) Specificity
  • (C) Selectivity
  • (D) Unstable nature of enzymes
πŸ’¬ Discuss
βœ… Correct Answer: (D) Unstable nature of enzymes

Q. . . . . . . . . is a method which is highly used for lab scale procedures than large scale work.

  • (A) Ultrasonication
  • (B) Homogenization
  • (C) Freezing
  • (D) Alkali treatment
πŸ’¬ Discuss
βœ… Correct Answer: (A) Ultrasonication

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