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MCQs

Total Questions : 67 | Page 2 of 7 pages
Question 11. Which enzyme removes the positive supercoils generated when the replication fork?
  1.    helicase
  2.    endonuclease
  3.    exonuclease
  4.    gyrase
 Discuss Question
Answer: Option D. -> gyrase
Answer: (d).gyrase
Question 12. The lagging strand is synthesized discontinuously.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 13. How many copies (approximately) of DNA polymerase III are present in a typical bacterial cell?
  1.    10
  2.    50
  3.    100
  4.    200
 Discuss Question
Answer: Option A. -> 10
Answer: (a).10
Question 14. When was DNA polymerase III discovered as the major enzyme behind DNA replication in bacteria?
  1.    1949
  2.    1959
  3.    1969
  4.    1989
 Discuss Question
Answer: Option C. -> 1969
Answer: (c).1969
Question 15. Who made the discovery that one DNA strand is synthesized discontinuously in fragments?
  1.    Francis Crick
  2.    Reiji Okazaki
  3.    James Watson
  4.    Louis Pasteur
 Discuss Question
Answer: Option B. -> Reiji Okazaki
Answer: (b).Reiji Okazaki
Question 16. When were the experiments in an effort to understand cell cycle regulation first conducted?
  1.    1970s
  2.    1980s
  3.    1990s
  4.    2000s
 Discuss Question
Answer: Option A. -> 1970s
Answer: (a).1970s
Question 17. The entry of a cell into M phase is initiated by _________________
  1.    interleukin factor
  2.    maturation promoting factor
  3.    transcription factor
  4.    necrosis factor
 Discuss Question
Answer: Option B. -> maturation promoting factor
Answer: (b).maturation promoting factor
Question 18. The regulatory subunit of maturation-promoting factor (MPF) is called _______________
  1.    kinase
  2.    cyclin
  3.    tetracyclin
  4.    interleukin
 Discuss Question
Answer: Option B. -> cyclin
Answer: (b).cyclin
Question 19. What will happen if a G₂ phase cell is fused with an M phase cell?
  1.    premature chromosome compaction
  2.    chromosome aggregation
  3.    gene transcription
  4.    inhibition of transcription
 Discuss Question
Answer: Option A. -> premature chromosome compaction
Answer: (a).premature chromosome compaction
Question 20. Cyclin binding leads to a change in the _________________ of kinase.
  1.    pH
  2.    temperature
  3.    concentration
  4.    conformation
 Discuss Question
Answer: Option D. -> conformation
Answer: (d).conformation

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