Bacteria that were infected with viruses that had radioactive proteins were not radioactive. This indicates that proteins did not enter the bacteria from the viruses. DNA is, therefore, the genetic material that
is passed from virus to bacteria
was concluded by Hershey and Chase.
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 used radioactive sulfur and phosphorus in their experiment?
Alfred Hershey
Which answer best explains why radioactive sulfur and phosphorus were used to label bacteriophages in the Hershey and Chase experiment?
In their experiment Hershey and Chase labeled the bacteriophages with radioactive isotopes to see where the virus attacks. They use
phosphorus 32 and sulfur 35 because proteins contain almost no phosphors and DNA contains almost no sulfur
. … DNA is a deoxyribonucleic acid that holds the code on how to make proteins.
What did the radioactive phosphorus on the bacteriophage prove in the Hershey Chase experiment?
Hershey and Chase were able to separate the phages into radioactive sulfur-containing protein ghosts and radioactive phosphorus-containing DNA. They found that the radioactive sulfur protein ghosts
could attach to bacterial membranes while
the radioactive phosphorus DNA could not.
What is the conclusion of Hershey and Chase experiment?
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.
Why did Hershey and Chase chose 35S and 32P?
a) Hershey and Chase grew
some viruses on a medium that contained radioactive phosphorus (
32
P)
and some others on a medium that contained radioactive sulfur (
35
S). … This indicates that proteins did not enter the bacteria from the viruses. DNA is, therefore, the genetic material that is passed from virus to bacteria.
What did the Hershey Chase experiment prove?
The Hershey-Chase experiment, which demonstrated that
the genetic material of phage is DNA, not protein
. The experiment uses two sets of T2 bacteriophages. In one set, the protein coat is labeled with radioactive sulfur (
35
S), not found in DNA. … DNA was thought to be a rather simple chemical.
Which bacteria killed the mice in Griffith's experiment?
As part of his experiments, Griffith tried injecting mice with
heat-killed S bacteria
(that is, S bacteria that had been heated to high temperatures, causing the cells to die). Unsurprisingly, the heat-killed S bacteria did not cause disease in mice.
What is are the conclusion of Blender's experiment?
1952: Geneticists Alfred Hershey and Martha Chase publish the findings of their so-called blender experiments, which conclude that
DNA is where life's hereditary data is found
. … Using the blender, Hershey and Chase separated the protein coating from the nuclei of bacteriophages, the viruses that infect bacteria.
How did Hershey and Chase use radioactivity to draw a conclusion?
Hershey and Chase studied
bacteriophages
which are viruses that attack bacteria. They labeled the bacteriophage with radioactive isotopes to see where it goes when a virus attacks. They discovered that nearly all the radioactivity was found in phosphorus, confirming that DNA contains genetic material, not protein.
What are 3 key roles of DNA?
DNA now has three distinct functions—
genetics, immunological, and structural
—that are widely disparate and variously dependent on the sugar phosphate backbone and the bases.
What did Avery conclude caused transformation?
What did Avery conclude caused transformation?
DNA was the transforming factor
. The harmless bacteria would not have been transformed, and the mice would have lived.
Why did Hershey and Chase use the T2 virus?
In order to show that proteins carry genetic information, Hershey and his lab technician, Martha Chase, decided to track the transfer of proteins and DNA between a virus and its host. For their experiment, they chose to use the T2 bacteriophage
as the vehicle for delivering genetic material
.
Why were bacteriophages used in the Hershey Chase experiment?
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 inference did Hershey and Chase draw from their experiment?
2. A. What conclusion did Hershey and Chase draw from their experiments? Hershey and
Chase concluded that DNA is the genetic material found in genes
.
