The Central Dogma Outlines the Flow of Genetic Information MCQ

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• Amino acids prior to their incorporation into polypeptide must be attached to a special adaptor molecule. Who proved this and when?
  ক

  Francis H. Crick in 1955

  খ

  Paul C. Zamecnic and Maholon B. Hoagland in 1957

  গ

  James Watson and Francis H. Crick in 1953

  ঘ

  Linus Pauling in 1950
• Multiple copies of RNA could be formed at the same time.
  ক

  True

  খ

  False
• Which of the following regarding the basic mechanism of gene expression is correct?
  ক

  DNA ―> tRNA ―> protein

  খ

  RNA ―> cDNA ―> mRNA ―> protein

  গ

  RNA ―> DNA ―> mRNA ―> protein

  ঘ

  DNA ―> protein
• Replication of DNA ends are carried out by polymerase.
  ক

  True

  খ

  False
• Who, in which year showed firm enzymological proof that DNA alone functions as the template for the synthesis of new DNA strands?
  ক

  Watson and Crick in 1953

  খ

  Avery, MacCarty and Macleod in 1944

  গ

  Meselson and Stahl in 1958

  ঘ

  Hershey and Chase in 1952
• Which of the following statements is true with respect to the DNA double helix?
  ক

  Composed of two or more polynucleotide chains

  খ

  The base pairs have opposite polarity

  গ

  Covalent bond exists in base pairing

  ঘ

  T is transcribed as U
• Watson and Crick’s suggestion of the complementary strand synthesis taking one of the parent strand as template was proposed in _________
  ক

  1869

  খ

  1909

  গ

  1953

  ঘ

  1952
• Semiconservative nature of replication of eukaryotic chromosome was first demonstrated by _______
  ক

  Walter Flemming on root tip cells of Vicia faba

  খ

  J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Vicia faba

  গ

  Walter Flemming on root tip cells of Phaseolus vulgaris

  ঘ

  J. Herbert Taylor, Philip Wood and Walter Hughes on root tip cells of Phaseolus vulgaris
• Who were the first to suggest that one strand of DNA might act as a template for the synthesis of its complementary strand?
  ক

  Meselson and Stahl

  খ

  Watson and crick

  গ

  Walter Flemming

  ঘ

  Rosalind Franklin and Maurice Wilkins