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STD 12 - 5. molecular basis of inheritance — BIOLOGY STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 ScienceBIOLOGYSTD 12 - 5. molecular basis of inheritance1 Mark
MCQ
Semi­conservative replication of $DNA$ was first demonstrated in
  • ✓
    Escherichia coli
  • B
    Streptococcus pneumoniae
  • C
    Salmonella typhimurium
  • D
    Drosophila melanogaster.
✓

Answer

Correct option: A.
Escherichia coli
a
(a) : Mathew Meselson and Franklin Stahl $(1958)$ conducted various experiments using isotopically labelled $DNA$ of Escherichia coli to provide evidence in favour of semi­conservative mode of $DNA$ replication.

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