Various Classes of RNA Have Different Functions MCQ

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• What is the angle between the D loop and the anticodon loop?
  ক

  45˚

  খ

  90˚

  গ

  135˚

  ঘ

  180˚
• The distance between the amino acid binding site and the anticodon site is ______
  ক

  64 Å

  খ

  70 Å

  গ

  76 Å

  ঘ

  80 Å
• Why the variable loop is named so?
  ক

  Variable number of bases

  খ

  Variable region

  গ

  Multiple loops present

  ঘ

  Variability of presence
• How many loops are present in the clover leaf model of tRNA?
  ক

  2

  খ

  3

  গ

  4

  ঘ

  5
• With respect to tRNA which of the following is not its characteristic?
  ক

  Complimentary region

  খ

  Double helix molecule

  গ

  Highly conserved pattern of fold

  ঘ

  Variable loop
• Thymine is present in tRNA.
  ক

  True

  খ

  False
• The 3’ end of tRNA is __________
  ক

  3’ CCA 5’

  খ

  3’ ACC 5’

  গ

  3’ CCG 5’

  ঘ

  3’ GCC 5’
• Which element of the ribosome plays a key role in mRNA translation?
  ক

  rRNA of the large subunit

  খ

  Proteins of the large subunit

  গ

  rRNA of the small subunit

  ঘ

  Proteins of the small subunit
• With respect to the composition of the ribosome which of the following is correct?
  ক

  Ribosome is composed of 60S and 30S subunit

  খ

  Eukaryotic ribosome small subunit contains only one 16S rRNA

  গ

  60S subunit consists of 5S rRNA and 23S rRNA

  ঘ

  60S and 40S makes up the 80S ribosome
• Which one of the following is known as the Kozak sequence?
  ক

  5’…..CNNAUCG…..3’

  খ

  5’…..GNNAUGG…..3’

  গ

  5’…..TNNAUGG…..3’

  ঘ

  5’…..GNNAUGC…..3’
• Eukaryotic mRNA is read in the 3’ to 5’ direction.
  ক

  True

  খ

  False
• Eukaryotic mRNAs recruit ribosomes using the Shine – Dalgarno sequence.
  ক

  True

  খ

  False
• Which part of the ribosome identifies the Shine – Dalgarno sequence?
  ক

  Protein

  খ

  16S rRNA

  গ

  23S rRNA

  ঘ

  5S rRNA
• What was the name of the ribosome binding site?
  ক

  ORF

  খ

  RBS

  গ

  A site

  ঘ

  Shine – Dalgarno sequence
• With respect to polycistronic mRNAs which of the following is wrong?
  ক

  Multiple ORFs

  খ

  Found in eukaryotes

  গ

  Encodes proteins with related functions

  ঘ

  Multiple polypeptide chain
• With respect to the open reading frame (ORF) which of the following is wrong?
  ক

  Starts at 5’ end

  খ

  ‘AUG’ is the only start codon for both prokaryotes and eukaryotes

  গ

  The start codon defines the reading frame for all the subsequent codons

  ঘ

  The stop codon is distinct from the ends of the mRNA