0
What effect did an injection of live R bacteria mixed with heat killed S bacteria have on the mice?
Wiki User
∙ 11y ago
The mice injected with mixture died
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What percent of bacteria will water kill?
What percentage of salt mixed in water kills bacteria
Why was the mixture of heat-killed S bacteria and R bacteria and R bacteria virulent?
It depends on how much heat is added. Most pathogenic bacteria are mesophiles, meaning that they thrive in medium temperatures. The optimal temperature is about 37 °C (99 °F), which is understandable considering that is our normal body temperature. Pathogenes in food are required to be killed off with 72 °C for 16 seconds, 70 °C for 2 minutes or 63 °C for 30 min. Regulations depend on country. This does not kill all pathogens, but enough to make it risk free to consume; one wants to reduce the adverse effect on taste at the same time. For conserves a higher temperature is prescribed: 121 °C. Freezing and dry heat are not safe ways to kill bacteria, as they can survive in an extremely resistant spore state (endospores). At 150 °C the DNA starts to be destroyed, however. If you heat bacteria using flame, such as with an inoculating loop over a Bunsen burner, they will be incinerated and die. Most bacteria are washed off, not killed, when you wash your hands. Usually shower and bath water is not hot enough to kill bacteria either. Alcohol is antiseptic, however. Some thermophilic bacterialike organisms can tolerate volcanic temperatures (to 130 °C), but these are archaea that will not harm anyone.
Why the virus bacteria is mixed with warm 0.5 percent agar?
Because it is pure.
Why is it necessary to isolate individualcolonies from a mixed growth?
In order to identify any of the species in a mixed culture, you first have to isolate individual colonies and grow them in a pure culture. You can't perform tests to identify bacteria in a mixed culture.
How do you isolate the bacteria from mixed culture which contains Fungus?
carefully pick up a small colony of bacteria from the plate with an inoculation loop and streak out a fresh medium containing plate
Does esomeprazole need to be mixed with sterile water for injection?
mixed with sterile water for injection
What is Fredderick Griffith hypothesis?
Frederick Griffith hypothesized that live, harmless bacteria and the heat-killed bacteria were mixed, some factor was transferred from the heat-killed cells into the live cells! it has nothing to do with bats flying thru walls!!
How many different bacteria were in the mixed culture?
If you really wanted to you could definitely determine how many different bacteria are in a mixed culture. You would have to do a lot of testing for specific bacteria though.
What percent of bacteria will water kill?
What percentage of salt mixed in water kills bacteria
Who killed nelson in mixed receptions?
You
Who killed Nelson Mixed reception?
You
Why did the mice die when giffith mixed the live R bacteria and the heat killed S bacteria?
Ikd
What is the purpose of quadrant streaking in bacterial cultivation?
The purpose is to isolate a pure culture of bacteria from a mixed culture of bacteria.
What does mixed enteric flora in urine mean?
Mixed = many species Enteric = from the intestines Flora = bacteria (in this sense) Sounds like a UTI caused by a bunch of different kinds of intestinal bacteria.
Why was the mixture of heat-killed S bacteria and R bacteria and R bacteria virulent?
It depends on how much heat is added. Most pathogenic bacteria are mesophiles, meaning that they thrive in medium temperatures. The optimal temperature is about 37 °C (99 °F), which is understandable considering that is our normal body temperature. Pathogenes in food are required to be killed off with 72 °C for 16 seconds, 70 °C for 2 minutes or 63 °C for 30 min. Regulations depend on country. This does not kill all pathogens, but enough to make it risk free to consume; one wants to reduce the adverse effect on taste at the same time. For conserves a higher temperature is prescribed: 121 °C. Freezing and dry heat are not safe ways to kill bacteria, as they can survive in an extremely resistant spore state (endospores). At 150 °C the DNA starts to be destroyed, however. If you heat bacteria using flame, such as with an inoculating loop over a Bunsen burner, they will be incinerated and die. Most bacteria are washed off, not killed, when you wash your hands. Usually shower and bath water is not hot enough to kill bacteria either. Alcohol is antiseptic, however. Some thermophilic bacterialike organisms can tolerate volcanic temperatures (to 130 °C), but these are archaea that will not harm anyone.
Does mixed acid fermentation occur in all bacteria?
No, some bacteria go through mixed acid fermentation, so go through 2,3 butanediol fermentation and some do not go through fermentation at all.
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?
yea
