The Ribosome : The Cell’s Decoding Machine MCQ

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• The polypeptide elongation channel allows the formation of which of the following structures?
  ক

  α – helix

  খ

  β – sheet

  গ

  Turns

  ঘ

  Loops
• The channel for the entry of the mRNA into the decoding center is a crucial feature for the proper decoding of them RNA.
  ক

  True

  খ

  False
• How many channels are observed in a ribosome molecule?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• The peptidyl transferase reaction center of the ribosome contains ___________ sites.
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• During the addition of amino acid, the codon on the mRNA is identified by the direct interaction of the anticodon loop of the tRNA.
  ক

  True

  খ

  False
• The polypeptide bond formation is an ATP dependent process.
  ক

  True

  খ

  False
• The peptidyl transferase reaction is a result of ____________ consecutive steps.
  ক

  2

  খ

  3

  গ

  4

  ঘ

  1
• How many charged tRNA substrate is used for the polypeptide formation at a time?
  ক

  1

  খ

  2

  গ

  3

  ঘ

  4
• Multiple proteins can be synthesized from an mRNA at a time.
  ক

  True

  খ

  False
• Svedberg unit used to distinguish among the rRNAs and proteins by measuring it’s ___________
  ক

  moecular weight

  খ

  mass

  গ

  composition

  ঘ

  sedimentation velocity
• The large ribosomal subunit in prokaryotes has the sedimentation velocity of ___________
  ক

  30S

  খ

  40S

  গ

  50S

  ঘ

  60S
• Ribosome has two subunits with 4 rRNA molecules. Which of the four rRNAs is found in the decoding center of the ribosome?
  ক

  5S

  খ

  23S

  গ

  28S

  ঘ

  16S
• Transcriptional coupling ensures a fast rate f translation.
  ক

  True

  খ

  False
• Transcription and translation occur in the same compartment in the cases of both prokaryotes and eukaryotes.
  ক

  True

  খ

  False
• The ribosome is designed in such a way so as to keep up with the speed of the RNA polymerase.
  ক

  True

  খ

  False
• How many polypeptides are required for the structural assembly of the ribosome?
  ক

  10

  খ

  Less than 10

  গ

  50

  ঘ

  More than 50