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MCQs

Total Questions : 105 | Page 4 of 11 pages
Question 31. Mark the one, which is NOT a subunit of ABC exinuclease?
  1.    UvrA
  2.    UvrB
  3.    UvrC
  4.    UvrF
 Discuss Question
Answer: Option D. -> UvrF
Answer: (d).UvrF
Question 32. Like replication, transcription also occurs bidirectionally.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 33. Mark the one, which is CORRECT for SOS repair.
  1.    RecA protein participates
  2.    A free radical mechanism is involved
  3.    The repair enzyme functions only once
  4.    No bases or nucleotides are removed
 Discuss Question
Answer: Option A. -> RecA protein participates
Answer: (a).RecA protein participates
Question 34. The process of formation of RNA is known as___________
  1.    Replication
  2.    DNA repair
  3.    Translation
  4.    Transcription
 Discuss Question
Answer: Option D. -> Transcription
Answer: (d).Transcription
Question 35. Which of the following is NOT the function of the enzyme systems involved in mismatch repair?
  1.    Recognize mismatched base pair
  2.    Gene conversion
  3.    Determine incorrect base from a mismatch
  4.    Excise incorrect base and carry out repair system
 Discuss Question
Answer: Option B. -> Gene conversion
Answer: (b).Gene conversion
Question 36. Mark the statement which is INCORRECT about the transcription unit?
  1.    It is a transcribed segment of DNA
  2.    Eukaryotes have monocistronic transcription unit
  3.    Prokaryotes also have a monocistronic transcription unit
  4.    Immediate product of transcription is primary transcript
 Discuss Question
Answer: Option C. -> Prokaryotes also have a monocistronic transcription unit
Answer: (c).Prokaryotes also have a monocistronic transcription unit
Question 37. Name the site where upstream sequences located?
  1.    Prior to start point
  2.    After the startpoint
  3.    Right border of DNA
  4.    In the middle of DNA
 Discuss Question
Answer: Option A. -> Prior to start point
Answer: (a).Prior to start point
Question 38. Which of the following is TRUE for the RNA polymerase activity?
  1.    DNA dependent DNA synthesis
  2.    Direct repair
  3.    DNA dependent RNA synthesis
  4.    RNA dependent RNA synthesis
 Discuss Question
Answer: Option C. -> DNA dependent RNA synthesis
Answer: (c).DNA dependent RNA synthesis
Question 39. Who discovered RNA polymerase?
  1.    Samuel B. Weiss
  2.    Nirenberg
  3.    Watson and Crick
  4.    Darwin
 Discuss Question
Answer: Option A. -> Samuel B. Weiss
Answer: (a).Samuel B. Weiss
Question 40. Which of the following ensure stable binding of RNA polymerase at the promoter site?
  1.    DNA photolyase
  2.    Sigma factor
  3.    DNA glycosylase
  4.    RecA
 Discuss Question
Answer: Option B. -> Sigma factor
Answer: (b).Sigma factor

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