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MCQs

Total Questions : 90 | Page 8 of 9 pages
Question 71. One of the first methods used to find tRNA genes was to search for sequences that are complementary and can fold into a knot like the three found in tRNAs.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 72. ______ molecules can simply be identified based on their sequence similarity with already-known sequences.
  1.    Larger, less conserved
  2.    Larger, highly conserved
  3.    smaller, highly conserved
  4.    shorter, highly conserved
 Discuss Question
Answer: Option B. -> Larger, highly conserved
Answer: (b).Larger, highly conserved
Question 73. Fichant and Burks (1991) described a program, tRNAscan, that searches a genomic sequence with a sliding window searching simultaneously for matches to a set of invariant bases and conserved self-complementary regions in tRNAs with an accuracy of 97.5%.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 74. The probabilistic model was used to identify small nucleolar (sno) RNAs in the yeast genome that methylate ribosomal RNA.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 75. The probability model mentioned above was a hybrid combination of HMMs and SCFGs trained on sno RNAs.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 76. Base pairing, in RNA, is A–G and U–C.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 77. In addition to the canonical base pairing, there often exists non-canonical base pairing such as _________ and ________ base paring.
  1.    G, U
  2.    G, C
  3.    U, C
  4.    A, C
 Discuss Question
Answer: Option A. -> G, U
Answer: (a).G, U
Question 78. The __________ refers to two single-stranded regions on opposite strands connecting two adjacent base-paired segments.
  1.    hairpin loop
  2.    interior loop
  3.    pseudoknot loop
  4.    helical junctions
 Discuss Question
Answer: Option B. -> interior loop
Answer: (b).interior loop
Question 79. The ______ refers to a structure with two ends of a single-stranded region (loop) connecting a base-paired region (stem).
  1.    helical junctions
  2.    hairpin loop
  3.    bulge loop
  4.    interior loop
 Discuss Question
Answer: Option B. -> hairpin loop
Answer: (b).hairpin loop
Question 80. Four main subtypes of secondary structures can be identified. They are hairpin loops, bulge loops, interior loops, and multi-branch loops.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True

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