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.
What would have happened if Avery had added an enzyme that digested all the nucleic acids to the mixture of heat-killed bacteria added the mixture to harmless bacteria and injected the mixture into mice a the harmless bacteria would not have been transformed and the mice?
What would have happened if Avery had added an enzyme that digested all the nucleic acids to the mixture of heat-killed bacteria, added the mixture to harmless bacteria, and injected the mixture into mice? a.
The harmless bacteria would have been transformed, and the mice would have died.
What did Avery conclude from his experiment?
What was Avery able to conclude from his experiment. He was able to conclude that
DNA was the transforming factor
. In other words, genes were made up of DNA.
What was the essential conclusion of Avery’s experiment on proteins and DNA?
Boivin’s conclusion was explicit: “
we should now look to the nucleic acid component of the giant nucleoprotein molecule that forms a gene, rather than to the protein part, to find the inductive properties of the gene”
[20]. Figure 1. Oswald T. Avery in 1944.
Which molecule did Avery identify as being responsible for the transformation?
These results suggested that
DNA
was the molecule responsible for transformation. Avery and his colleagues provided further confirmation for this hypothesis by chemically isolating DNA from the cell extract and showing that it possessed the same transforming ability as the heat-treated extract.
What did Griffith conclude from his experiment in transformation?
Griffith concluded that
the heat-killed bacteria somehow converted live avirulent cells to virulent cells
, and he called the component of the dead S-type bacteria the “transforming principle.” Fig. 1.1. Schematic diagram of Griffith’s experiment which demonstrates bacterial transformation.
What did Hershey and Chase conclude?
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.
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 would Hershey and Chase have concluded if both radioactive?
What would Hershey and Chase have concluded if both radioactive
32
P and
35
S were found in the bacteria in their experiment?
The virus’s protein coat was not injected into the bacteria
. The virus’s DNA was not injected into the bacteria. … purines in DNA is much greater than the percentage of pyrimidines.
What happened when heat-killed S strain was injected into a mouse?
In the critical experiment, Frederick Griffith (1928) mixed heat-killed S with live R and injected the combination into mice: the mouse died. The dead
mouse’s tissues were found to contain live bacteria with smooth coats like
S.
What did Avery conclude?
What did Avery conclude? He concluded that
DNA transmits genetic information
.
Who was the first to conclude that DNA is the genetic material?
T/
F Oswald Avery
was the first to conclude that DNA is the genetic material. T/F James Watson and Francis Crick used X-Rays to learn about DNA structure.
Why did Oswald Avery discover DNA?
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.
What is meant by bacterial transformation?
Bacterial transformation is
a process of horizontal gene transfer by which some bacteria take up foreign genetic material (naked DNA) from the environment
. … Sometimes the exogenous genetic material may co-exist as a plasmid with chromosomal DNA.
What did Watson and Crick discover about DNA?
Created by Rosalind Franklin using a technique called X-ray crystallography, it revealed the helical shape of the DNA molecule. Watson and Crick realized that
DNA was made up of two chains of nucleotide pairs that encode the genetic information for all living things
.
What is S strain and R strain?
The R strain is non-pathogenic (does not cause disease).
The S strain is pathogenic (disease-causing)
, and has a capsule outside its cell wall. The capsule allows the cell to escape the immune responses of the host mouse. When Griffith injected the living S strain into mice, they died from pneumonia.
