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.
Related Questions
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
Which component of the bacteriophage was found inside the bacteria in the Hershey-Chase experiment, confirming DNA as the genetic material?
Radioactively labeled protein (35S)
Radioactively labeled DNA (32P)
Both radioactively labeled protein and DNA
Neither radioactively labeled protein nor DNA
In Hershey and Chase's experiment, what was the key observation that supported DNA as the genetic material?
Radioactive sulfur () was found inside the bacteria.
Radioactive phosphorus () remained outside the bacteria.
Both radioactive sulfur () and phosphorus () were found inside the bacteria.
Radioactive phosphorus () was found inside the bacteria.
If Hershey and Chase had found radioactive sulfur () inside the bacteria instead of radioactive phosphorus (), what would have been the conclusion of their experiment?
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.
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
The final proof of DNA as the genetic material came from the experiment of
Hargobind Khorana
Griffith
Hershey and Chase
Avey, Mcleod and McCarty
The definitive evidence establishing DNA as the genetic material was derived from the experiments of:
James Watson and Francis Crick
Frederick Griffith
Oswald Avery, Colin MacLeod, and Maclyn McCarty
Alfred Hershey and Martha Chase
If Hershey and Chase had found both 32P and 35S inside the bacteria, what would have been the conclusion of their experiment regarding the genetic material?
DNA is the genetic material
Protein is the genetic material
Both DNA and protein are the genetic material
The experiment would be inconclusive regarding which molecule is the genetic material
Which experiment definitively proved that DNA, and not protein, carries genetic information?
Griffith's transformation experiment
Avery, MacLeod, and McCarty's experiment
Meselson and Stahl's DNA replication experiment
Hershey and Chase's bacteriophage experiment
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
