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MCQs

Total Questions : 108 | Page 10 of 11 pages
Question 91. . Which of the following in DNA replication and transcription are common?
  1.    incorporation of deoxynucleotides
  2.    utilization the same enzyme
  3.    synthesis in the 5'-3' direction
  4.    none of the above
 Discuss Question
Answer: Option C. -> synthesis in the 5'-3' direction
Question 92. . During conventional transformation experiments E. coli cells and plasmid DNA interacts in an environment of
  1.    high temperature and Ca++
  2.    low temperature and Ca++
  3.    high temperature and Mg++
  4.    low temperature and Mg++
 Discuss Question
Answer: Option B. -> low temperature and Ca++
Question 93. . The site on a bacterial chromosome that marks the initiation point for chromosome replication is called
  1.    Ori
  2.    a promoter
  3.    Pro
  4.    an initiation codon
 Discuss Question
Answer: Option A. -> Ori
Question 94. . 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 95. . The B-DNA structure found in solution is a
  1.    left-handed double helix of antiparallel chains (10 bp/turn)
  2.    right-handed double helix of antiparallel chains (∼10 bp/turn)
  3.    left-handed zig-zag helix of antiparallel chains (10 bp/turn)
  4.    right-handed double helix of parallel chains (∼10 bp/turn)
 Discuss Question
Answer: Option B. -> right-handed double helix of antiparallel chains (∼10 bp/turn)
Question 96. . What is the exact name of the classical Watson-Crick double helix DNA?
  1.    A-DNA
  2.    B-DNA
  3.    Z-DNA
  4.    X-DNA
 Discuss Question
Answer: Option B. -> B-DNA
Question 97. . TM refers to the temperature at which
  1.    membranes are 50% fluid
  2.    50% of a DNA molecule is denatured
  3.    50% of a protein molecules are denatured
  4.    all of the above
 Discuss Question
Answer: Option D. -> all of the above
Question 98. . In an agarose gel, DNA is moving from
  1.    cathode to anode
  2.    left to right
  3.    anode to cathode
  4.    A to B
 Discuss Question
Answer: Option A. -> cathode to anode
Question 99. . DNA segments capable of moving from one place in the genome to another is known as
  1.    transposons
  2.    retrovirus
  3.    introns
  4.    moving elements
 Discuss Question
Answer: Option A. -> transposons
Question 100. 3. An RNA primer is synthesized by
  1.    DNA helicases
  2.    ligase
  3.    DNA topoisomerase
  4.    primase
 Discuss Question
Answer: Option D. -> primase

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