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MCQs

Total Questions : 101 | Page 10 of 11 pages
Question 91. The B-DNA structure found in solution is a
  1.    left-handed zig-zag helix of antiparallel chains (10 bp/turn)
  2.    left-handed double helix of antiparallel chains (10 bp/turn)
  3.    right-handed double helix of parallel chains (∼10 bp/turn)
  4.    right-handed double helix of antiparallel chains (∼10 bp/turn)
 Discuss Question
Answer: Option D. -> right-handed double helix of antiparallel chains (∼10 bp/turn)
Question 92. The site on a bacterial chromosome that marks the initiation point for chromosome replication is called
  1.    an initiation codon
  2.    Pro
  3.    Ori
  4.    a promoter
 Discuss Question
Answer: Option C. -> Ori
Question 93. What is the exact name of the classical Watson-Crick double helix DNA?
  1.    B-DNA
  2.    A-DNA
  3.    Z-DNA
  4.    X-DNA
 Discuss Question
Answer: Option A. -> B-DNA
Question 94. In an agarose gel, DNA is moving from
  1.    left to right
  2.    anode to cathode
  3.    cathode to anode
  4.    A to B
 Discuss Question
Answer: Option C. -> cathode to anode
Question 95. Which will require a higher temperature to denature?
  1.    DNA with a high G-C content
  2.    DNA with a high A-T content
  3.    RNA with a high G-C content
  4.    RNA with a high A-T content
 Discuss Question
Answer: Option A. -> DNA with a high G-C content
Question 96. TM refers to the temperature at which
  1.    50% of a DNA molecule is denatured
  2.    membranes are 50% fluid
  3.    50% of a protein molecules are denatured
  4.    All of these
 Discuss Question
Answer: Option D. -> All of these
Question 97. First evident that DNA is genetic material comes from the experiment of Griffith is
  1.    translation
  2.    transduction
  3.    transformation
  4.    replication
 Discuss Question
Answer: Option C. -> transformation
Question 98. What does ligase do during replication of DNA?
  1.    Makes copies of mRNA from DNA
  2.    Synthesizes the lagging strand
  3.    Joins nicks in DNA strands
  4.    Digests mRNA when it is no longer needed
 Discuss Question
Answer: Option C. -> Joins nicks in DNA strands
Question 99. Proteins which help to open the double helix for DNA synthesis are
  1.    single stranded binding proteins
  2.    DNA helicases
  3.    DNA topoisomerase
  4.    ligase
 Discuss Question
Answer: Option B. -> DNA helicases
Question 100. DNA segments capable of moving from one place in the genome to another is known as
  1.    moving elements
  2.    introns
  3.    transposons
  4.    retrovirus
 Discuss Question
Answer: Option C. -> transposons

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