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sesenic [268]
3 years ago
11

If we have a plate that has 2500 colonies on it, can we use this plate to calculate CFU's

Biology
1 answer:
AleksAgata [21]3 years ago
6 0

No, the solution with bacteria in it needs to be diluted in order to be in the range of 30 – 300.

A colony-forming unit –CFU is used to estimate the number of viable (ability to divide by binary fission) microbes in a sample.  

A sample of microbes is diluted and spread on a plate. Then, the number of colonies is counted, assuming that each colony have grown from a single colony-forming unit, or CFU.

Plates with more than 300 colonies are difficult to count while those with less than 30 colonies give statistically unreliable numbers of colonies to count.

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Expected prevalence of a disease is:______.
goldfiish [28.3K]

Answer: c) the anticipated geographical spread of a disease based on past observances.

Explanation: Prevalence simply means the widespread of a thing or condition. In epidemiology, prevalence can be defined as the total number of people in a population that is affected by a medical condition or total number of cases of a disease in a population in a given period of time.

Expected prevalence of a disease is therefore the anticipated widespread of a disease or the anticipated total number of cases of a disease in a population based on past observed incidences.

5 0
3 years ago
Which carbohydrates are found in our genetic material?
Kisachek [45]

The carbohydrates found in our genetic material are the two sugars deoxyribose and ribose.

Carbohydrates are defined as organic compounds which occur in food and living tissue and include starch, sugars and cellulose. They are composed of hydrogen, oxygen and carbon.

Deoxyribose is a sugar found in the structure of DNA, while the sugar ribose is found in the structure of RNA.

DNA is the molecule that carries the cell's genetic information while RNA is the molecule involved in synthesis of protein using the coded information received from DNA.

Both DNA and RNA are termed as the genetic molecules of life.


7 0
3 years ago
What did gregor mendel want to find out when he decided to study pea plants.
Alexxx [7]

Answer:

How traits/characters were passed down and inherited from parents to offspring.

7 0
2 years ago
Neither signs nor symptoms appear in people with anaphylaxis when they
zysi [14]

Answer:

The answer to this question would be True.

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The first time an allergen is introduced into your immune system, it triggers a response to create antibodies against the allergen. Only subsequent exposure to the allergen triggers anaphylaxis.

Hopefully this helped.

3 0
3 years ago
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Pani-rosa [81]
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8 0
3 years ago
Read 2 more answers
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