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MCQs

Total Questions : 95 | Page 9 of 10 pages
Question 81. Which of following is basic unit of DNA packaging?
  1.    chromatin
  2.    alpha helix
  3.    nucleus
  4.    nucleosome
 Discuss Question
Answer: Option D. -> nucleosome
Answer: (d).nucleosome
Question 82. How many nucleotide pairs are present in DNA of a single human cell?
  1.    6 billion
  2.    6 million
  3.    60 million
  4.    2 billion
 Discuss Question
Answer: Option A. -> 6 billion
Answer: (a).6 billion
Question 83. Which of following enzymes joins sugar-phosphate backbone?
  1.    helicase
  2.    topoisomerase
  3.    ligase
  4.    proteases
 Discuss Question
Answer: Option C. -> ligase
Answer: (c).ligase
Question 84. Which of following bases can make dimers if they're adjacent to a DNA molecule?
  1.    thymine
  2.    adenine
  3.    cytosine
  4.    uracil
 Discuss Question
Answer: Option A. -> thymine
Answer: (a).thymine
Question 85. How many layers of base pairs is present in every turn of helix?
  1.    2
  2.    4
  3.    5
  4.    10
 Discuss Question
Answer: Option D. -> 10
Answer: (d).10
Question 86. Which of following is a DNA repair system?
  1.    DNA joining
  2.    nucleotide excision repair
  3.    Repairase
  4.    DNA binding
 Discuss Question
Answer: Option B. -> nucleotide excision repair
Answer: (b).nucleotide excision repair
Question 87. How many types of histones are most commonly found in chromatin?
  1.    2
  2.    3
  3.    4
  4.    5
 Discuss Question
Answer: Option C. -> 4
Answer: (c).4
Question 88. Telomeres typically contain which of following?
  1.    short repeats
  2.    genes
  3.    poly a tail
  4.    poly t tail
 Discuss Question
Answer: Option A. -> short repeats
Answer: (a).short repeats
Question 89. Purine bases have how many rings in their structure?
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option B. -> 2
Answer: (b).2
Question 90. What is diameter of a nucleosome?
  1.    5 nm
  2.    3 nm
  3.    2 nm
  4.    10 nm
 Discuss Question
Answer: Option D. -> 10 nm
Answer: (d).10 nm

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