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(A) Frederick Griffith performed a series of experiments in $1928$ using the bacterium $Streptococcus 	ext{ } pneumoniae$ (also known as $Pneumococcu

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Pneumococcus

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(A) Frederick Griffith performed a series of experiments in $1928$ using the bacterium $Streptococcus 	ext{ } pneumoniae$ (also known as $Pneumococcus$).He used two strains of this bacterium: $S$-strain (virulent, smooth, encapsulated) and $R$-strain (non-virulent, rough, non-encapsulated).Through his experiments on mice, he observed the phenomenon of bacterial transformation, where the $R$-strain bacteria were transformed into $S$-strain bacteria by a 'transforming principle' released from heat-killed $S$-strain bacteria.Therefore, the correct organism used in his experiments was $Pneumococcus$.

Frederick Griffith performed a series of experiments on which of the following organisms?

Similar Questions

Select the incorrect statement.

The result of which of the following reaction experiments carried out by Avery et al. on $Streptococcus \text{ } pneumoniae$ has proved conclusively that $DNA$ is the genetic material?

The relationship between genes and $\text{DNA}$ is best understood by $.........$ ?

In some viruses, $RNA$ is present instead of $DNA$, indicating that:

If the transforming principle is transferred to the $R$-strain,what characteristics will the $R$-strain acquire?
$(i)$ Formation of a smooth polysaccharide coat
$(ii)$ Becomes non-virulent
$(iii)$ Becomes virulent
$(iv)$ Does not form a smooth polysaccharide coat

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