Quiz  /  Molecular Biology Gate & PSU MCQ Questions With Answers

  • 1. 
    Which of the following processes does not occur in prokaryotes?

  • Transcription
  • Splicing
  • Translation
  • Replication

  • 2. 
    Presence of the heparin promotes transcription.

  • True
  • False

  • 3. 
    Which part of the ribosome identifies the Shine – Dalgarno sequence?

  • Protein
  • 16S rRNA
  • 23S rRNA
  • 5S rRNA

  • 4. 
    Who was the first to propose indirect interaction between mRNA template and amino acids to produce accurate ordering of amino acid in a polypeptide chain?

  • Paul C. Zamecnic
  • James Watson
  • Francis H. Crick
  • Mahlon B. Hoagland

  • 5. 
    The RNA polymerase core enzyme converts into a holoenzyme on the addition of the _________ subunit.

  • α
  • β
  • β’
  • σ

  • 6. 
    Which enzyme is used in the unwinding of DNA?

  • Ligase
  • Topoisomerase
  • Helicase
  • Exonuclease

  • 7. 
    Which of the following statements is not applicable to viruses?

  • The virus replicates in a bacterial host
  • The protein coat of a virus does not enter the host cell
  • The genetic material is DNA or RNA
  • Virus replicate autonomously in the absence of host

  • 8. 
    Mode of DNA replication is

  • Conservative and bidirectional
  • Semiconservative and unidirectional
  • Semiconservative and bidirectional
  • Conservative and unidirectional

  • 9. 
    How many RNA polymerases are present in a bacterial system?

  • 4
  • 2
  • 1
  • 3
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