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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does turbidity indicate in a liquid culture?
💡 Hint: Think about what makes a liquid look cloudy.
Question 2
Easy
What device is used to measure optical density?
💡 Hint: It’s the tool we talked about that assesses light absorption.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does a higher optical density (OD) indicate in a microbial culture?
- A lower concentration of cells
- No cells present
- A higher concentration of cells
💡 Hint: Think about how many cells would make the culture look cloudier.
Question 2
True or False: Turbidimetric methods only measure living cells.
- True
- False
💡 Hint: Recall our discussion on the limitations of OD measurements.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Your lab is conducting a growth study of E. coli, and initial OD readings show low turbidity. What additional tests might you recommend to ascertain cell viability and the microbial population's actual concentration?
💡 Hint: Think about what methods allow you to measure live cells.
Question 2
Consider a scenario where environmental samples show varying turbidity. How would you validate the results of your OD measurements to ensure they accurately reflect microbial growth?
💡 Hint: What other techniques could confirm your readings?
Challenge and get performance evaluation