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Clostridium Botulinum - This is the most dangerous of all the bacteria. About 200 grams of the toxin would be enough to kill the entire population of the world.
It grows where there is no oxygen and a low quantity of acid and can be found on badly canned food. In such conditions the bacteria produce toxin which, if eaten, gives you a food poisoning called botulism. When food is canned, it is heated to temperatures that destroy the bacteria. Botulism is extremely rare, but you should avoid cans which are damaged in any way. The toxin from it can be very fatal.
What else can I help you with?
Why was the mixture of S bacteria and R BACTERIA virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
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.
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 did Griffith experiments prove DNA is responsible for mice developing pneumonia?
Griffith's experiments involved injecting mice with different strains of Streptococcus pneumoniae. He observed that mice injected with the heat-killed virulent strain survived, while those injected with live non-virulent strains did not. Remarkably, when he mixed heat-killed virulent bacteria with live non-virulent bacteria, the mice developed pneumonia and died. This indicated that some "transforming principle" from the dead virulent bacteria was taken up by the live non-virulent bacteria, suggesting that DNA was responsible for the trait of virulence.
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.
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.
Why was the mixture of S bacteria and R BACTERIA virulent?
The live R bacteria acquired a capsule and became live, virulent S bacteria.
How would use virulent be used in a sentence?
this bacteria is virulent strain
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.
How did Griffith experiments show that hereditary factor was involved in the bacterial transformation?
Griffith's experiments, conducted in the 1920s, demonstrated that non-virulent strains of Streptococcus pneumoniae could be transformed into virulent strains when exposed to heat-killed virulent bacteria. He observed that when live non-virulent bacteria were mixed with the heat-killed virulent bacteria, some of the non-virulent bacteria took up the hereditary material from the dead bacteria, becoming virulent themselves. This transformation indicated the presence of a "hereditary factor" that carried the information necessary for virulence, laying the groundwork for the later discovery of DNA as the genetic material.
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.
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
How did Griffith experiments prove DNA is responsible for mice developing pneumonia?
Griffith's experiments involved injecting mice with different strains of Streptococcus pneumoniae. He observed that mice injected with the heat-killed virulent strain survived, while those injected with live non-virulent strains did not. Remarkably, when he mixed heat-killed virulent bacteria with live non-virulent bacteria, the mice developed pneumonia and died. This indicated that some "transforming principle" from the dead virulent bacteria was taken up by the live non-virulent bacteria, suggesting that DNA was responsible for the trait of virulence.
Who is the Scientist discovered nonvirulent bacteria transformed into virulent bacteria?
Frederick Griffith discovered the phenomenon wherein exogenous DNA of heat killed virulent bacteria was taken up by a similar but non-virulent bacteria. This resulted in the transformation of the living bacterial cells into the virulent variety. This was prior to the understanding that DNA was the genetic material and the hereditary information passed onto the living bacteria was referred to as the "transforming principle." Source : Russell "iGenetics : A Molecular Approach."
What did Avery and Griffith prove?
Avery and Griffith proved that DNA is the molecule responsible for carrying genetic information. In their 1944 experiments, they showed that the transformation of non-virulent bacteria into virulent forms was caused by the transfer of DNA from heat-killed virulent bacteria to live non-virulent bacteria. This work built on Griffith's earlier findings and established the foundational concept that DNA serves as the genetic material in organisms.
How would you use the word virulent in a sentence?
Virulent means actively poisonous. You could use it in a sentence as, "the man had a virulent snake bite."
