In the Hershey-Chase experiment, what crucial observation confirmed that DNA, and not protein, was the genetic material injected into bacteria by bacteriophages?
Radioactive sulfur (35S) was found inside the bacterial cells, while radioactive phosphorus (32P) remained outside.
Both radioactive phosphorus (32P) and sulfur (35S) were found inside the bacterial cells.
Neither radioactive phosphorus (32P) nor sulfur (35S) were found inside the bacterial cells.
Radioactive phosphorus (32P) was found inside the bacterial cells, while radioactive sulfur (35S) remained outside.
Related Questions
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
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.
Which of the following is NOT a key feature of the transforming principle, as demonstrated by Griffith?
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.
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.
