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

11. Controlling Microbial Growth

Physical Methods to Control Microbial Growth

Microbiology

11. Controlling Microbial Growth

Physical Methods to Control Microbial Growth

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Multiple Choice

This method of physical microbial control combines the removal of all moisture with extremely low temperatures.

Desiccation.

Lyophilization.

Irradiation.

Pasteurization.

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Verified step by step guidance

Understand the concept of lyophilization: Lyophilization, also known as freeze-drying, is a method used to preserve microorganisms by removing moisture through sublimation at low temperatures.

Identify the key components of lyophilization: It involves freezing the microbial sample and then reducing the surrounding pressure to allow the frozen water in the sample to sublimate directly from solid to gas.

Compare lyophilization with other methods: Desiccation involves drying out the sample but not necessarily at low temperatures. Irradiation uses radiation to kill microbes, and pasteurization involves heating to kill pathogens.

Recognize the advantages of lyophilization: This method preserves the viability and structure of microorganisms, making it ideal for long-term storage and transport.

Apply the concept: When asked about a method combining moisture removal and low temperatures, lyophilization is the correct answer due to its unique process of freeze-drying.