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
The Hershey-Chase experiment provided definitive evidence that DNA is the genetic material. Which of the following best describes their experimental approach?
Observing bacterial transformation using purified protein extracts
Analyzing the chemical composition of chromosomes
Radioactively labeling phage DNA and protein to track their fate during infection
Studying the inheritance patterns of mutant bacteria
Hershey and Chase utilized bacteriophages to demonstrate that DNA is the genetic material. What is a bacteriophage?
A type of bacteria
A bacterial enzyme
A virus that infects bacteria
A component of bacterial DNA
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.
In his bacteriophage experiments, Hershey and Chase demonstrated that DNA is genetic material in
TMV
bacteriophage
The final proof of DNA as the genetic material came from the experiment of
Hargobind Khorana
Griffith
Hershey and Chase
Avey, Mcleod and McCarty
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
What was the key observation in the Hershey-Chase experiment that supported DNA as the genetic material?
Radioactive sulfur (S) was found inside the bacterial cells.
Radioactive phosphorus (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.
Which enzyme was used by Avery, MacLeod and McCarty to prove that DNA is the genetic material?
RNase
Protease
DNase
Lipase
In the Hershey-Chase experiment, why was radioactive sulfur (35S) used to label phage proteins?
Sulfur is a component of both DNA and protein
Sulfur is a component of proteins but not DNA
Sulfur is easily detectable in bacterial cells
Sulfur is a common component of bacterial cell walls
From his transformation experiment Griffith concluded with transforming principle might be?
DNA
Polysaccharide Capsule
RNA
None
