Why did Hershey and Chase grow viruses in cultures that contained both radioactive phosphorus and radioactive sulfur what might have happened if they had used only one radioactive substance?
What might have happened if they had used only one radioactive substance? The radioactive substances serve as markers to label the DNA and proteins of the bacteriophage during the experiment. If sulfur appeared in the bacteria, that means the virus injected protein to the bacteria, since DNA does not contain sulfur.
Why did Hershey and Chase used radioactive sulfur and phosphorus?
What technique did Hershey and Chase use to study the viruses in their experiments? They used radioactive isotopes of phosphorus-32 and sulfur-35 as markers so they could trace the proteins and DNA to see what they were doing to the cell.
Why did Hershey and Chase use radioactive sulfur and phosphorus to trace the fates of proteins and DNA respectively that was injected into T2 bacterial phages that infected bacterial cells?
Hershey and Chase used radioactive sulfur and phosphorus to trace the fates of protein and DNA, respectively, of T2 phages that infected bacterial cells. They wanted to see which of these molecules entered and could reprogram the cells to make more phages.
Why did Hershey and Chase label the viral DNA with radioactive phosphorus and not radioactive sulfur group of answer choices?
Why did Hershey and Chase label the viral DNA with radioactive phosphorus and not radioactive sulfur? DNA contains phosphorus but no sulfur. Protein contains sulfur but no phosphorus. (By growing viruses in separate cultures, they ensured that one sample had only radioactive DNA while the other had radioactive protein.
Why did Griffith inject a mouse with live harmless bacteria?
(R strain) produced colonies with rough edges. First, Griffith took a culture of the S strain, heated the cells to kill them, and then injected the heat-killed bacteria into laboratory mice. The mice survived, suggesting that the cause of pneumonia was not a toxin from these disease-causing bacteria.
What was the conclusion to the Hershey and Chase experiment?
Hershey and Chase concluded that protein was not genetic material, and that DNA was genetic material. Unlike Avery’s experiments on bacterial transformations, the Hershey-Chase experiments were more widely and immediately accepted among scientists.
What were the results of Hershey and Chase’s experiment strengthen Avery’s conclusion?
How did the results of the Hershey-Chase experiment strengthen Avery’s conclusions? Hershey and Chase studied bacteriophages which are viruses that attack bacteria. In their experiment Hershey and Chase labeled the bacteriophages with radioactive isotopes to see where the virus attacks.
What was the purpose of Avery’s experiment?
In a very simple experiment, Oswald Avery’s group showed that DNA was the “transforming principle.” When isolated from one strain of bacteria, DNA was able to transform another strain and confer characteristics onto that second strain. DNA was carrying hereditary information.
What did the experiments of Griffith and Avery?
The experiments of Griffin and Avery proved that DNA of heat-killed S strain bacteria was responsible for developing pneumonia in mouses that were infected with heat-killed S and live R strain bacteria. They concluded that DNA of the S strain bacteria was passed on the next generation, which was able to infect lungs.
What did the Hershey Chase experiment demonstrate quizlet?
Importantly, they showed that phage DNA enters the host cell and directs phage reproduction. This showed that DNA was the genetic material that was passed down from the virus to a cell and thus DNA was the material that is passed from a cell to another cell.
What virus did Hershey and Chase start with?
In 1952, Alfred Hershey and Martha Chase published a convincing demonstration that DNA (not protein) was the genetic material. The Hershey–Chase experiment was carried out with a virus, called bacteriophage T2, that infects bacteria.
What did Hershey and Chase conclude was the genetic material of the virus?
Hershey and Chase concluded that DNA, not protein, was the genetic material. They determined that a protective protein coat was formed around the bacteriophage, but that the internal DNA is what conferred its ability to produce progeny inside a bacterium.