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MCQs

Total Questions : 58 | Page 6 of 6 pages
Question 51. . The nonsense codon(s) is/are
  1.    UAG
  2.    UAA
  3.    UGA
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Question 52. . During amino acid activation a(n)
  1.    amino acid is bound to tRNA
  2.    amino acid is bound to mRNA
  3.    methyl group is attached to rRNA
  4.    methyl group is attached to an amino acid
 Discuss Question
Answer: Option A. -> amino acid is bound to tRNA
Question 53. . Which of the following molecule catalyzes the transpeptidation reaction?
  1.    RNA polymerase
  2.    Peptidyl transferase
  3.    DNA ligase
  4.    DNA polymerase
 Discuss Question
Answer: Option B. -> Peptidyl transferase
Question 54. . 
Which of the following defines an open reading frame (ORF)?
  1.    A sequence of genome in bacteriophage
  2.    The sequence of a complete genome
  3.    A plasmid vector used in genome sequencing
  4.    A possible gene predicted by DNA sequencing
 Discuss Question
Answer: Option D. -> A possible gene predicted by DNA sequencing
Question 55. . Three stop codons, which aids in termination of translation are also known as
  1.    pause codons
  2.    nonsense codons
  3.    missense codons
  4.    antisense codons
 Discuss Question
Answer: Option B. -> nonsense codons
Question 56. . The ribosome binding site
  1.    forms a stem-loop structure in the RNA
  2.    is located upstream of the promoter sequence
  3.    is located immediately upstream of the start codon
  4.    is more likely to be associated with an operon than with a gene encoding a single protein
 Discuss Question
Answer: Option C. -> is located immediately upstream of the start codon
Question 57. . Which of the termination codon is called amber?
  1.    UAA
  2.    UAG
  3.    UGA
  4.    AUG
 Discuss Question
Answer: Option B. -> UAG
Question 58. . Which of the termination codon is called amber?
  1.    UAA
  2.    UAG
  3.    UGA
  4.    AUG
 Discuss Question
Answer: Option B. -> UAG

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