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

Enrichment Media

Microbiology

10. Dynamics of Microbial Growth

Enrichment Media

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Multiple Choice

Microbiologists can use a range of media to grow microbes in the lab. If a microbiologist wants to differentiate hemolytic bacteria from non-hemolytic bacteria in their sample, what form of media should they use?

Selective media.

Complex media.

Differential media.

Chemically defined media.

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Verified step by step guidance

Understand the purpose of the media: The goal is to differentiate between hemolytic and non-hemolytic bacteria. This requires a medium that can show visible differences between these types of bacteria.

Define differential media: Differential media are designed to distinguish between different types of microorganisms based on their biological characteristics. They contain specific indicators that reveal differences in microbial growth or metabolic products.

Consider the characteristics of hemolytic bacteria: Hemolytic bacteria can break down red blood cells, often resulting in a clear zone around the colonies on blood agar, a common differential medium.

Evaluate other media types: Selective media inhibit the growth of certain microbes while allowing others to grow, complex media provide nutrients for a wide range of organisms, and chemically defined media have known specific chemical compositions. None of these specifically differentiate hemolytic activity.

Conclude with the appropriate choice: Based on the need to observe hemolytic activity, differential media, such as blood agar, is the appropriate choice to differentiate hemolytic from non-hemolytic bacteria.