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MCQs

Total Questions : 369 | Page 2 of 37 pages
Question 11. 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
Answer: (a).DNA with a high G-C content
Question 12. 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
Answer: (a).transposons
Question 13. 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
Answer: (d).all of the above
Question 14. What does ligase do during replication of DNA?
  1.    Synthesizes the lagging strand
  2.    Makes copies of mRNA from DNA
  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
Answer: (c).Joins nicks in DNA strands
Question 15. 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
Answer: (a).cathode to anode
Question 16. RNA instability in alkaline solutions is due to
  1.    adenine
  2.    ribose
  3.    uracil
  4.    single strand nature
 Discuss Question
Answer: Option B. -> ribose
Answer: (b).ribose
Question 17. Two features of the tRNA molecule associated, in converting the triplet codon to an amino acid, are
  1.    in the T Loop and D stem and loop
  2.    in the anticodon loop and D stem loop
  3.    in the anticodon loop and the 3' CCA end
  4.    none of the above
 Discuss Question
Answer: Option C. -> in the anticodon loop and the 3' CCA end
Answer: (c).in the anticodon loop and the 3' CCA end
Question 18. In RNA, uracil pairs with
  1.    adenine
  2.    cytosine
  3.    thymine
  4.    guanine
 Discuss Question
Answer: Option A. -> adenine
Answer: (a).adenine
Question 19. The direction of amino acid transfer to the growing polypeptide chain is
  1.    from the A (aminoacyl tRNA site) site to the P (peptidyl tRNA site) site on the ribosome
  2.    from the P site to the A site on the ribosome
  3.    from the A site to the E (exit tRNA site) site on the ribosome
  4.    from the P site to the E site on the ribosome
 Discuss Question
Answer: Option B. -> from the P site to the A site on the ribosome
Answer: (b).from the P site to the A site on the ribosome
Question 20. The pathway of a tRNA during polypeptide elongation on the ribosome is
  1.    A site → P site → E site
  2.    P site → entry site → exit site
  3.    A site → P site → entry site
  4.    P site → A site → E site
 Discuss Question
Answer: Option A. -> A site → P site → E site
Answer: (a).A site → P site → E site

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