Practice Colony Forming Unit (cfu) (3.2) - Monitoring and Measurement of Microorganisms

Practice: Colony Forming Unit (CFU)

Lesson 3.2Monitoring and Measurement of Microorganisms

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9 questions

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3 cards from this section. Quick, good the night before a test.
Exercise
6 questions · about 4 min · pass mark 70%. Hints available.
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Quiz
3 questions · about 2 min · pass mark 70%. Hints available.
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6 sample questions

Question 1.
What does CFU stand for?
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Think about what we measure in microbiology.
Question 2.
What is a common medium used for culturing bacteria?
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Recall the substance that supports bacterial growth.
3Question 3.
What does CFU measure?
- The total number of bacteria
- The number of viable bacteria
- The amount of nutrients
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Think about what CFU stands for.
4Question 4.
True or False: Turbidity is always a reliable indicator of microbial contamination.
- True
- False
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Consider other factors that can contribute to turbidity.
Question 5.
You perform a serial dilution of a water sample and find 50 CFUs on the agar plate from a 1:1000 dilution. How many CFUs were in the original sample?
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Remember to consider how much you diluted the original sample.
Question 6.
During a water quality test, a sample has high turbidity and you're unsure whether it's due to microorganisms or sediment. How would you proceed?
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Consider what the next logical step is to confirm microbial presence.

5 more questions in this section. Enroll free to practise them all.