Practice - Methods for Measuring Microbial Growth
Practice Questions
Test your understanding with targeted questions
What do we measure using direct cell counts?
💡 Hint: Think about what methods measure all cells.
What does CFU stand for?
💡 Hint: It relates to viable counts.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What does CFU stand for?
💡 Hint: Think about what it refers to in terms of growth.
True or False? Turbidimetric methods only measure viable cells.
💡 Hint: Reflect on what turbidity indicates.
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Challenge Problems
Push your limits with advanced challenges
A biologist needs a viable count of bacteria from a sample that could have been contaminated. She plates a 10^-3 dilution and gets 300 colonies after 24 hours. Calculate the CFU/mL.
💡 Hint: Remember to consider the dilution factor.
If a culture is measured at an optical density of 0.8 at 600 nm, what does this imply about cell density, and what further action would you take to ensure a viable count?
💡 Hint: Think about correlating OD measurements with viabilities.
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Reference links
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