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MCQs

Total Questions : 241 | Page 8 of 25 pages
Question 71. What was the first bacterial genome to be sequenced and made public?
  1.    Bacillus subtilis
  2.    Escherichia coli
  3.    Haemophilus influenzae
  4.    No bacterial genome has been sequenced yet
 Discuss Question
Answer: Option C. -> Haemophilus influenzae
Answer: (c).Haemophilus influenzae
Question 72. Which of the following modified amino acid is used at the starting of most prokaryotic proteins?
  1.    N-formylserine
  2.    N-formylmethionine
  3.    N-formylleucine
  4.    N-formylalanine
 Discuss Question
Answer: Option B. -> N-formylmethionine
Answer: (b).N-formylmethionine
Question 73. 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
Answer: (d).A possible gene predicted by DNA sequencing
Question 74. 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
Answer: (b).Peptidyl transferase
Question 75. 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
Answer: (b).nonsense codons
Question 76. 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
Answer: (c).is located immediately upstream of the start codon
Question 77. Which of the termination codon is called amber?
  1.    UAA
  2.    UAG
  3.    UGA
  4.    AUG
 Discuss Question
Answer: Option B. -> UAG
Answer: (b).UAG
Question 78. The plasmid-mediated properties is/are
  1.    fermentation of lactose
  2.    production of enterotoxin
  3.    resistance to antibiotics
  4.    all of these
 Discuss Question
Answer: Option D. -> all of these
Answer: (d).all of these
Question 79. What is the term used for a segment of DNA with one or more genes in the centre and the two ends carrying inverted repeat sequences of nucleotides?
  1.    Plasmid
  2.    Transposon
  3.    Insertion sequence
  4.    None of these
 Discuss Question
Answer: Option B. -> Transposon
Answer: (b).Transposon
Question 80. In the extracellular medium, DNA-degrading enzymes would likely be to prevent transfer of DNA by
  1.    conjugal transfer by a self-transmissible plasmid
  2.    generalized phage transduction
  3.    natural transformation
  4.    none of the above
 Discuss Question
Answer: Option C. -> natural transformation
Answer: (c).natural transformation

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