0
The S bacteria possess a protective polysaccharide capsule that helps them evade the immune system, allowing them to survive and cause infection. The R bacteria lack this capsule and are easily targeted and eliminated by the immune system, thus they are not virulent.
Add your answer:
Earn +20 pts
Why were the S bacteria not the R bacteria virulent?
The S bacteria were not virulent because they lacked the capsule that is present in the R bacteria. The capsule is a protective layer that helps the bacteria evade the immune system of the host. Without the capsule, the S bacteria were unable to cause infection.
Why did the mice die when giffith mixed the live R bacteria and the heat killed S bacteria?
Ikd
Who is the Scientist discovered nonvirulent bacteria transformed into virulent bacteria?
Frederick Griffith, a British bacteriologist, discovered the transformation of nonvirulent bacteria into virulent bacteria through his experiments with Streptococcus pneumoniae in the 1920s. This experiment laid the foundation for the discovery of the genetic material DNA.
How would you use the word virulent in a sentence?
The virulent strain of bacteria spread rapidly throughout the community, causing many people to fall ill.
Who Was responsible for the experiment with mice and bacteria that led to the hypothesis that when two bacteria were mixed together something was passed to the living cells?
This experiment was conducted by Frederick Griffith in 1928. He observed that when he mixed a harmless strain of bacteria with a heat-killed virulent strain, the harmless bacteria were transformed into a virulent form. This led to the hypothesis that something in the heat-killed bacteria had transformed the live bacteria.
Why was the mixture of S bacteria and R BACTERIA virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
Why was the mixture of heat killed s bacteria and r bacteria virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
What did Griffith find to be true after his experiments with the s and r strain of bacteria?
Griffith hypothesized that a chemical component from the virulent S cells had somehow transformed the R cells into the more virulent S form.
What did fred griffith find to be true after his experiment with the S and R strains of bacteria?
Fred Griffith found that genetic information could be transferred between different strains of bacteria, specifically between the harmless R strain and the virulent S strain of bacteria. This led to the discovery of transformation, a process where genetic material is exchanged between bacteria.
Why were the S bacteria not the R bacteria virulent?
The S bacteria were not virulent because they lacked the capsule that is present in the R bacteria. The capsule is a protective layer that helps the bacteria evade the immune system of the host. Without the capsule, the S bacteria were unable to cause infection.
What was the molecule that caused transformation in Griffith's pneumonia experiment?
The molecule that caused transformation in Griffith's pneumonia experiment was DNA. Specifically, it was the transfer of DNA from heat-killed virulent bacteria to live non-virulent bacteria that resulted in the transformation of the non-virulent bacteria into a virulent form.
What does virulent bacteria mean?
Virulent bacteria are ones that are able to cause disease. Examples of potentially virulent bacteria are Staphylococcus aureus and Neisseria gonorrhea.
How would use virulent be used in a sentence?
this bacteria is virulent strain
Is capsulated bacteria are virulent or non virulent?
Capsulated bacteria are usually more virulent compared to non-capsulated bacteria. The presence of a capsule helps the bacteria evade the host's immune system and promotes its ability to cause disease. Capsules can provide protection against phagocytosis, making the bacteria more likely to establish an infection.
How Griffith prooved DNA as genetic material?
proved transforming principle not proteinchanged non-virulent bacteria into virulentbacteria by mixing with heat killed virulent bacteria
Why did the mice die when giffith mixed the live R bacteria and the heat killed S bacteria?
Ikd
What was the different about the S bacteria and R bacteria?
the conversion of R forms of one type into S forms of a different type
