20%

30%

40%

50%

E. Coli

Tetracoccus

Diplococcus

Penicillin

DNA

Polysaccharide Capsule

RNA

None

Protein

RNA

DNA

Carbohydrates

Radioactive sulfur ($^{35}$S) was found inside the bacterial cells.

Radioactive phosphorus ($^{32}$P) was found inside the bacterial cells.

Both radioactive sulfur and phosphorus were found inside the bacterial cells.

Neither radioactive sulfur nor phosphorus were found inside the bacterial cells.

DNA is the genetic material.

Protein is the genetic material.

Both DNA and protein are the genetic material.

Neither DNA nor protein is the genetic material.

It is composed of protein.

It can change the characteristics of bacteria.

It can be passed from one generation of bacteria to the next.

It was later identified as DNA.

Frederick Griffith - Discovered the phenomenon of transformation

Linus Pauling - Isolated DNA for the first time

Francis Crick - Proposed one gene-one polypeptide hypothesis

George Beadle - Proposed the concept of inborn errors

${{\rm{H}}^3}$

${{\rm{P}}^{32}}$

${{\rm{N}}^{15}}$

${{\rm{S}}^{35}}$

Bacterial DNA

Protein Capsid of Phage

Cytoplasm of bacteria

Phage DNA

${}^{32}P$

${}^{35}P$

${}^{35}S$

${}^{23}P$