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MCQs

Total Questions : 101 | Page 3 of 11 pages
Question 21. A cesium chloride will separate DNA molecules by
  1.    absorption
  2.    adhesion
  3.    resorption
  4.    density
 Discuss Question
Answer: Option D. -> density
Question 22. Which of the following enzyme adds complementary bases during replication?
  1.    Polymerase
  2.    Helicase
  3.    Replicase
  4.    Synthesase
 Discuss Question
Answer: Option A. -> Polymerase
Question 23. Which DNA polymerase removes RNA primers in DNA synthesis?
  1.    Polymerase III
  2.    none of these
  3.    Polymerase II
  4.    Polymerase I
 Discuss Question
Answer: Option D. -> Polymerase I
Question 24. Enzymes, responsible for unraveling short segments of DNA is
  1.    DNA ligase
  2.    helicase
  3.    DNA polymerase
  4.    primase
 Discuss Question
Answer: Option B. -> helicase
Question 25. If one cell has AT contents 40%, what will be the percentage of Guanine residue?
  1.    15%
  2.    30%
  3.    60%
  4.    Guanine residue can not be calculated
 Discuss Question
Answer: Option B. -> 30%
Question 26. Enzyme, responsible for proofreading base pairing is
  1.    Telomerase
  2.    DNA polymerase
  3.    DNA ligase
  4.    Primase
 Discuss Question
Answer: Option B. -> DNA polymerase
Question 27. Which of the following would not contain DNA?
  1.    Glass crystals
  2.    Bacteria
  3.    Mold
  4.    Yeast
 Discuss Question
Answer: Option A. -> Glass crystals
Question 28. Proteins involved in opening a replication bubble are
  1.    DNA helicases
  2.    single stranded binding proteins
  3.    DNA topoisomerase
  4.    ligase
 Discuss Question
Answer: Option C. -> DNA topoisomerase
Question 29. What bands will be observed in a cesium chloride gradient after two rounds of replication?
  1.    One light and one medium band
  2.    One medium and one heavy band
  3.    One medium band
  4.    One light, one medium and one heavy band
 Discuss Question
Answer: Option A. -> One light and one medium band
Question 30. The nucleosome consists of histone
  1.    hexamer and 146 bp of DNA
  2.    tetramer and 146 bp of DNA
  3.    octamer and 146 bp of DNA
  4.    None of these
 Discuss Question
Answer: Option C. -> octamer and 146 bp of DNA

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