The Search for Genetic Material MCQ

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• Which was considered to be as the genetic material prior to the works done by Oswald Avery, Colin MacLeod and Maclyn McCarty?
  ক

  Nucleoids

  খ

  Nucleons

  গ

  Protein

  ঘ

  Chromosome
• What will be the state of the mouse that has been injected with the heat killed S-strain from the Staphylococcus pneumoniae?
  ক

  Alive

  খ

  Dead

  গ

  On the verge of dying

  ঘ

  Lives with pneumonia
• Which of the following is responsible for the inhibition of transformation in organisms?
  ক

  DNase

  খ

  RNase

  গ

  Protease

  ঘ

  Nuclease
• Which of the following is responsible for transforming the R strain into the S strain?
  ক

  Purified bio-chemicals from S-strain

  খ

  Purified bio-chemicals from R-strain

  গ

  Purified bio-chemicals from heat killed S-strain

  ঘ

  Purified bio-chemicals from heat killed R-strain
• Which of the following is the wrong sequential order, when the S or the R strain of the bacterium is injected into the mice?
  ক

  Mice -> S strain -> Dead

  খ

  Mice -> R strain -> Alive

  গ

  Mice -> Heat killed S strain -> Alive

  ঘ

  Mice -> Heat killed S strain + live R strain -> Alive
• The mice infected with the R strain of the bacterium dies, but when infected with the S strain, they do not die.
  ক

  False

  খ

  True
• When Streptococcus pneumoniae were cultured in a culture plate by Frederick Griffith, which among the following were produced?
  ক

  Smooth colonies(S) and Rough colonies (R)

  খ

  Shiny colonies (S) and Rough colonies (R)

  গ

  Smooth colonies (S) and Rigorous colonies (R)

  ঘ

  Silky colonies (S) and Rigorous colonies (R)