Question

Which organism did griffith use in his studies?

A). staphylococcus aureus
B). streptococcus pneumoniae
C). streptococcus pyogenes
D). escherichia coli

Answer 1

B). Streptococcus pneumoniae

Step-by-step explanation:

Griffith conducted experiments to understand the transformation of this bacterium and its impact on genetic material.

Answer 2

Frederick Griffith used Streptococcus pneumoniae in his transformation experiments, which were crucial for the discovery that DNA carries genetic information. Option b is the answer.

Step-by-step explanation:

The organism that Griffith used in his famous transformation experiments was Streptococcus pneumoniae. In these experiments, Griffith demonstrated that a non-virulent form of the bacteria could be transformed into a virulent form when exposed to heat-killed virulent bacteria. He worked with two strains of S. pneumoniae: the S strain, which was pathogenic and had a smooth appearance due to its capsule, and the R strain, which was non-pathogenic and had a rough appearance because it lacked a capsule. The discovery was crucial in establishing that DNA is the substance that carries genetic information, leading to a further understanding of genetics and molecular biology.