Table of contents

1. Introduction to Microbiology3h 22m
2. Disproving Spontaneous Generation1h 18m
3. Chemical Principles of Microbiology3h 38m
4. Water1h 28m
5. Molecules of Microbiology2h 23m
6. Cell Membrane & Transport3h 28m
7. Prokaryotic Cell Structures & Functions5h 52m
8. Eukaryotic Cell Structures & Functions2h 18m
9. Microscopes2h 46m
10. Dynamics of Microbial Growth4h 36m
11. Controlling Microbial Growth4h 10m
12. Microbial Metabolism5h 16m
13. Photosynthesis2h 31m
14. DNA Replication2h 25m
15. Central Dogma & Gene Regulation7h 14m
16. Microbial Genetics4h 44m
17. Biotechnology3h 0m
18. Viruses, Viroids, & Prions4h 56m
19. Innate Immunity7h 15m
20. Adaptive Immunity7h 14m
21. Principles of Disease6h 57m

10. Dynamics of Microbial Growth

Measuring Growth by Biomass

Microbiology

10. Dynamics of Microbial Growth

Measuring Growth by Biomass

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Multiple Choice

A scientist wants to determine the biomass of the bacterial populations in his experiment using a spectrophotometer. He finds that population A has a higher turbidity than population B. What does this tell us about the bacterial populations?

More light was able to pass through population B than population A.

The liquid population A is being grown in is more cloudy than the liquid population B is being grown in.

Population A has more biomass than population B.

All of the above.

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Verified step by step guidance

Understand the concept of turbidity: Turbidity is a measure of how cloudy a liquid is, which is often used to estimate the biomass of bacterial populations. Higher turbidity indicates more particles or cells in the liquid, leading to less light passing through.

Relate turbidity to biomass: In microbiology, turbidity is directly related to the biomass of bacterial populations. A higher turbidity means there are more bacterial cells present, thus a higher biomass.

Analyze the spectrophotometer readings: A spectrophotometer measures the amount of light that passes through a sample. If population A has higher turbidity, it means less light passes through compared to population B.

Compare the cloudiness of the liquids: Since population A has higher turbidity, the liquid it is grown in is more cloudy than the liquid for population B.

Conclude based on observations: Given that population A has higher turbidity, it can be concluded that population A has more biomass than population B, and all the statements provided are correct.