Avery, MacLeod, and McCarty purified the 'transforming principle' identified by Griffith. Which treatment specifically abolished the transforming activity, proving its chemical nature?
Protease
Ribonuclease
Deoxyribonuclease
Lipase
Related Questions
Which one of the following is correctly matched?
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
Which observation from Griffith's experiment with Streptococcus pneumoniae provided the strongest evidence for the existence of a 'transforming principle'?
Live non-virulent bacteria did not cause disease in mice.
Heat-killed virulent bacteria did not cause disease in mice.
Live virulent bacteria caused disease in mice.
Heat-killed virulent bacteria, when mixed with live non-virulent bacteria, caused the latter to become virulent.
In Griffith's experiment, which strain of Streptococcus pneumoniae caused the death of mice?
S strain (smooth)
R strain (rough)
Heat-killed S strain
Heat-killed R strain
Griffith conducted his transformation experiments on?
E. Coli
Tetracoccus
Diplococcus
Penicillin
Griffith conducted his transformation experiments on?
E. Coli
Tetracoccus
Diplococcus
Penicillin
From his transformation experiment Griffith concluded with transforming principle might be?
DNA
Polysaccharide Capsule
RNA
None
From his transformation experiment Griffith concluded with transforming principle might be?
DNA
Polysaccharide Capsule
RNA
None
What did Griffith observe when he injected a mixture of heat-killed S strain and live R strain bacteria into mice?
The mice died, and live S strain bacteria were recovered.
The mice survived.
The mice died, and live R strain bacteria were recovered.
The mice survived, and a new strain of bacteria was recovered.
