$A$ series of experiments were conducted by Frederick Griffith in $1928$,on the transforming principle with:

  • A
    Salmonella typhimurium
  • B
    Escherichia coli
  • C
    Streptococcus pneumoniae
  • D
    Bacillus thuringiensis

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Which scientist discovered $DNA$?

Recall the experiments done by Frederick Griffith,Avery,MacLeod,and McCarty,where $DNA$ was speculated to be the genetic material. If $RNA$,instead of $DNA$,was the genetic material,would the heat-killed strain of $Pneumococcus$ have transformed the $R$-strain into a virulent strain? Explain.

Who invented the method of identification of nutrient characters in $Neurospora$ $crassa$?

The transforming principle was proposed by ...... .

In which bacteria did Hershey and Chase perform the infection of bacteriophages?

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