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Most Probable Number (MPN) Test
Neuroscience MCQ
201
Which of the following is NOT a common application of the MPN test?
A:
Water quality testing
B:
Dairy product safety
C:
Air quality monitoring
D:
Food safety testing
202
What kind of growth pattern is observed in the MPN test tubes?
A:
Uniform growth across all tubes
B:
No growth in any tubes
C:
Variable growth depending on dilution
D:
Growth only in control tubes
203
How does the MPN test differ from the plate count method?
A:
MPN provides a direct count, while plate count estimates
B:
MPN estimates bacterial numbers, while plate count provides direct counts
C:
MPN uses statistical analysis, while plate count does not
D:
MPN is faster than plate count method
204
In the MPN test, what does the term “confirmation test” refer to?
A:
A second MPN test on the same sample
B:
A test to confirm the presence of a specific bacterial type
C:
A test to confirm the sample's volume
D:
A retest for accuracy in different conditions
205
Which of the following is a limitation of the MPN test?
A:
Provides exact bacterial counts
B:
Time-consuming
C:
Requires sophisticated equipment
D:
Cannot be used for large volumes
206
What is the standard dilution factor used in the MPN test?
A:
1:10
B:
2:40
C:
17:40
D:
167:40:00
207
What does a high MPN value typically indicate?
A:
Low contamination
B:
High contamination
C:
No contamination
D:
Uncertain contamination level
208
Why are multiple tubes used in the MPN test?
A:
To increase sample size
B:
To ensure accurate results
C:
To account for variability and improve accuracy
D:
To decrease analysis time
209
What is the role of selective media in the MPN test?
A:
To inhibit the growth of unwanted bacteria
B:
To enhance bacterial growth
C:
To test for antibiotic resistance
D:
To measure bacterial size
210
How are the results of the MPN test typically reported?
A:
As a binary positive/negative result
B:
As a specific bacterial species count
C:
As a most probable number of bacteria
D:
As a range of bacterial types
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