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MCQs

Total Questions : 244 | Page 3 of 25 pages
Question 21. Transformation means
  1.    formation of a pilus
  2.    acquiring DNA from the bacterial cell environment
  3.    plasmid containing a F factor
  4.    F+ and F- strains of bacteria
 Discuss Question
Answer: Option B. -> acquiring DNA from the bacterial cell environment
Answer: (b).acquiring DNA from the bacterial cell environment
Question 22. Which of the following is correct?
  1.    HIV is a retrovirus that kills human helper T cells
  2.    Causes acquired immune deficiency syndrome (AIDS)
  3.    Cripples the immunity systems
  4.    All of the above
 Discuss Question
Answer: Option D. -> All of the above
Answer: (d).All of the above
Question 23. How many ds DNA molecule can be produced, which comprise precisely the target region in double strand form during 4th cycle of PCR?
  1.    Two ds DNA molecule
  2.    Three ds DNA molecule
  3.    Eight ds DNA molecule
  4.    Four ds DNA molecule
 Discuss Question
Answer: Option D. -> Four ds DNA molecule
Answer: (d).Four ds DNA molecule
Question 24. Restriction maps
  1.    allows comparison between DNA molecules without the need to determine nucleotide sequence
  2.    allows comparison between DNA molecules but requires to determine nucleotide sequence
  3.    does not allow comparison between DNA molecules
  4.    none of the above
 Discuss Question
Answer: Option A. -> allows comparison between DNA molecules without the need to determine nucleotide sequence
Answer: (a).allows comparison between DNA molecules without the need to determine nucleotide sequence
Question 25. A PCR cycle consists of
  1.    three steps, denaturation, primer annealing and elongation
  2.    three steps, denaturation, initiation and elongation
  3.    three steps, primer annealing, elongation and termination
  4.    three steps, initiation, elongation and termination
 Discuss Question
Answer: Option A. -> three steps, denaturation, primer annealing and elongation
Answer: (a).three steps, denaturation, primer annealing and elongation
Question 26. Maltose hydrolysis yields
  1.    D-galactose and D-glucose
  2.    2-Dglucose
  3.    n-Dglucose
  4.    2-Dfructose
 Discuss Question
Answer: Option B. -> 2-Dglucose
Answer: (b).2-Dglucose
Question 27. The major factor(s) determining whether glucose is oxidized by aerobic or anaerobic glycolysis is/are
  1.    Ca⁺²
  2.    FADH₂
  3.    NADH and the ATP/ADP ratio
  4.    Presence of high AMP
 Discuss Question
Answer: Option C. -> NADH and the ATP/ADP ratio
Answer: (c).NADH and the ATP/ADP ratio
Question 28. Dextrin hydrolysis yields
  1.    D-galactose and D-glucose
  2.    2-Dglucose
  3.    n-Dglucose
  4.    2-Dfructose
 Discuss Question
Answer: Option C. -> n-Dglucose
Answer: (c).n-Dglucose
Question 29. Which of the following is true about the enzyme producing NADH from a triose phosphate in the glycolytic pathway?
  1.    It produces 1, 3-biphosphoglycerate and NADH
  2.    It catalyzes irreversible reaction
  3.    It uses NAD⁺ and dihydroxyacetone phosphate as substrates
  4.    It uses FADH₂ and glyceraldehyde 3-phosphate as substrates
 Discuss Question
Answer: Option A. -> It produces 1, 3-biphosphoglycerate and NADH
Answer: (a).It produces 1, 3-biphosphoglycerate and NADH
Question 30. When glucose is converted to lactate by anaerobic glycolysis, equivalent number of ATPs derived is?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2

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