What is one reason to use the Most Probable Number (MPN) method?

Coliforms and MPN Testing Methods

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Biology
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9th - 10th Grade
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Hard

Patricia Brown
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To calculate the salinity of water
To determine the temperature of water
To detect the presence of coliforms in diluted samples
To measure the pH level of water
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why are coliforms important in water quality testing?
They help in oxygenating the water
They indicate the presence of heavy metals
They are a sign of chemical pollution
They can suggest fecal contamination
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a coliform?
A chemical compound
A type of virus
A type of algae
A bacterium that can use lactose
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in the MPN laboratory procedure?
Incubate the samples overnight
Use the MPN table to interpret results
Add 0.1 milliliters of water sample to tubes
Prepare the water sample by adding 10 milliliters to tubes
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of incubating the water samples overnight in the MPN procedure?
To allow chemical reactions to occur
To enable the growth of coliforms
To sterilize the samples
To measure the temperature change
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the significance of using different volumes of water samples in the MPN test?
To assess growth at different dilutions
To test different pH levels
To measure the salinity of the water
To ensure accurate temperature readings
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How do you determine the number of viable cells using the MPN method?
By checking the color change in the sample
By using the MPN table with growth data
By counting the number of cloudy tubes
By measuring the pH of the sample
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