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MCQs

Total Questions : 150 | Page 9 of 15 pages
Question 81. A problem exists when comparing _____ sequences using the dot matrix method, namely, the _______
  1.    small, amplification
  2.    large, amplification
  3.    small, high noise level
  4.    large, high noise level
 Discuss Question
Answer: Option D. -> large, high noise level
Answer: (d).large, high noise level
Question 82. If the selected window size is too long, sensitivity of the alignment is lost.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 83. Which of the following is untrue about dot plot method and its applications?
  1.    This method gives a direct visual statement of the relationship between two sequences
  2.    One of its advantages is the identification of sequence repeat regions based on the presence of parallel diagonals of the same size vertically or horizontally in the matrix
  3.    It is not useful in identifying chromosomal repeats
  4.    The method can be used in identifying nucleic acid secondary structures through detecting self-complementarity of a sequence
 Discuss Question
Answer: Option C. -> It is not useful in identifying chromosomal repeats
Answer: (c).It is not useful in identifying chromosomal repeats
Question 84. A sequence can be aligned with itself to identify internal repeat elements.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option A. -> True
Answer: (a).True
Question 85. Self complementarity of DNA sequences cannot be identified using a dot plot.
  1.    True
  2.    False
  3.    May be True or False
  4.    Can't say
 Discuss Question
Answer: Option B. -> False
Answer: (b).False
Question 86. What is the length of a motif, in terms of amino acids residue?
  1.    30- 60
  2.    10- 20
  3.    70- 90
  4.    1- 10
 Discuss Question
Answer: Option B. -> 10- 20
Answer: (b).10- 20
Question 87. Which of the common structural motifs are described wrongly?
  1.    β-hairpin – adjacent antiparallel strands
  2.    Greek key – 4 adjacent antiparallel strand
  3.    β-α-β – 2 parallel strands connected by helix
  4.    β-α-β – 2 antiparallel strands connected by helix
 Discuss Question
Answer: Option D. -> β-α-β – 2 antiparallel strands connected by helix
Answer: (d).β-α-β – 2 antiparallel strands connected by helix
Question 88. On average, what is the length of a typical domain?
  1.    About 100 residues
  2.    About 300 residues
  3.    About 500 residues
  4.    About 900 residues
 Discuss Question
Answer: Option A. -> About 100 residues
Answer: (a).About 100 residues
Question 89. Which of the following is false about the ‘loop’ structure in proteins?
  1.    They connect helices and sheets
  2.    They are more tolerant of mutations
  3.    They are more flexible and can adopt multiple conformations
  4.    They are never the components of active sites
 Discuss Question
Answer: Option D. -> They are never the components of active sites
Answer: (d).They are never the components of active sites
Question 90. Which of the following least describes Long Loop β-hairpins?
  1.    They are Often referred to as a ‘random coil’ conformation
  2.    Generally they are referred to as the β-meander supersecondary structure
  3.    Loop looks similar to the Greek Letter Ω
  4.    Wide-range of conformations with very specific sequence preferences
 Discuss Question
Answer: Option D. -> Wide-range of conformations with very specific sequence preferences
Answer: (d).Wide-range of conformations with very specific sequence preferences

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