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Most Probable Number (MPN) Test
Neuroscience MCQ
211
What is the significance of a “negative” result in an MPN test?
A:
No bacteria detected
B:
Bacteria are present in high numbers
C:
The sample is contaminated
D:
Results are inconclusive
212
What type of statistical analysis is used to interpret MPN test results?
A:
Descriptive statistics
B:
Inferential statistics
C:
Poisson distribution
D:
Chi-square test
213
How is the MPN number usually expressed?
A:
In colony-forming units per milliliter
B:
As a percentage
C:
As a ratio
D:
In most probable number per 100 mL
214
What does the MPN table help determine?
A:
Type of bacteria present
B:
Bacteria count estimate
C:
Antibiotic resistance
D:
Bacterial growth rate
215
Which medium is commonly used in the MPN test?
A:
Nutrient agar
B:
EMB agar
C:
Lauryl tryptose broth
D:
MacConkey agar
216
What does a positive MPN test result indicate?
A:
No bacteria present
B:
Low bacteria concentration
C:
High bacteria concentration
D:
Possible bacterial contamination
217
What is the purpose of using different dilution levels in the MPN test?
A:
To increase the sample size
B:
To improve the accuracy of results
C:
To test different types of bacteria
D:
To estimate bacteria concentration
218
Which type of sample is commonly used in the MPN test?
A:
Solid food samples
B:
Water samples
C:
Air samples
D:
Soil samples
219
In the MPN test, what does the term “most probable number” refer to?
A:
The highest number of bacteria detected
B:
The most accurate count of bacteria
C:
An estimate of bacteria concentration
D:
The minimum bacteria concentration
220
What does the MPN test primarily measure?
A:
Total coliform bacteria
B:
E. coli presence
C:
Fecal coliform bacteria
D:
Yeast contamination
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