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MCQs

Total Questions : 107 | Page 4 of 11 pages
Question 31. Which of the following statements is true?
  1.    The template strand matches the sequence of the RNA transcript
  2.    The two strands of DNA run parallel to each other
  3.    G-C bonds are much more resistant to denaturation than A-T rich regions
  4.    The common form of DNA is left handed
 Discuss Question
Answer: Option C. -> G-C bonds are much more resistant to denaturation than A-T rich regions
Answer: (c).G-C bonds are much more resistant to denaturation than A-T rich regions
Question 32. Because DNA is a highly charged polyanion, its stability to heat denaturation
  1.    does not depend on hydrophobic interactions
  2.    increases with increasing salt
  3.    is independent of G - C content
  4.    decreases with increasing salt
 Discuss Question
Answer: Option B. -> increases with increasing salt
Answer: (b).increases with increasing salt
Question 33. Nucleoside is a pyrimidine or purine base
  1.    covalently bonded to a sugar
  2.    ionically bonded to a sugar
  3.    hydrogen bonded to a sugar
  4.    none of the above
 Discuss Question
Answer: Option A. -> covalently bonded to a sugar
Answer: (a).covalently bonded to a sugar
Question 34. The sugar in RNA is __________ , the sugar in DNA is __________
  1.    deoxyribose, ribose
  2.    ribose, deoxyribose
  3.    ribose, phosphate
  4.    ribose, uracil
 Discuss Question
Answer: Option B. -> ribose, deoxyribose
Answer: (b).ribose, deoxyribose
Question 35. In gel electrophoresis, what fragments will move most quickly through a gel?
  1.    Large fragments
  2.    Small fragments
  3.    Large genome
  4.    None of these
 Discuss Question
Answer: Option B. -> Small fragments
Answer: (b).Small fragments
Question 36. Which pyrimidine base contains an amino group at carbon 4?
  1.    Cytosine
  2.    Thymine
  3.    Uracil
  4.    Adenine
 Discuss Question
Answer: Option A. -> Cytosine
Answer: (a).Cytosine
Question 37. Which of the following is true about tₘ?
  1.    It can be termed as renaturation temperature
  2.    The higher the content of G ≡ C base pairs, the higher the tₘ
  3.    The higher the content of A = T base pairs, the higher the tₘ
  4.    The higher the content of G ≡ C base pairs, the lower the tₘ
 Discuss Question
Answer: Option B. -> The higher the content of G ≡ C base pairs, the higher the tₘ
Answer: (b).The higher the content of G ≡ C base pairs, the higher the tₘ
Question 38. Which of the following nucleotides is not present in RNA?
  1.    AMP
  2.    GMP
  3.    CMP
  4.    TMP
 Discuss Question
Answer: Option D. -> TMP
Answer: (d).TMP
Question 39. Which of the following is false about denaturation?
  1.    Disruption of hydrogen bonds
  2.    Disruption of phosphodiester linkage
  3.    Loss of helical structure of DNA
  4.    It is resulted as a result of change in pH or increase in temperature
 Discuss Question
Answer: Option B. -> Disruption of phosphodiester linkage
Answer: (b).Disruption of phosphodiester linkage
Question 40. DNA denaturation is measured by absorbance at ___________
  1.    220nm
  2.    230nm
  3.    250nm
  4.    260nm
 Discuss Question
Answer: Option D. -> 260nm
Answer: (d).260nm

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