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

Liquid Chemicals: Surface-Active Agents

Microbiology

11. Controlling Microbial Growth

Liquid Chemicals: Surface-Active Agents

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Multiple Choice

Which of the following statements are FALSE?

Soaps are made from organic materials like animal fats.

Detergents are made from synthetic materials.

Soaps interact with salt molecules in water which leaves a residue after washing.

Soaps and Detergents kill microbes and are effective sterilants.

All of the following are true.

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Verified step by step guidance

Understand the context: The problem is asking which statements about soaps and detergents are false. It provides several statements and asks you to identify the incorrect one.

Review the properties of soaps: Soaps are typically made from natural organic materials such as animal fats or vegetable oils. They work by emulsifying oils and dirt, allowing them to be washed away with water.

Review the properties of detergents: Detergents are usually synthetic and are designed to work in a variety of water conditions, including hard water. They are often more effective than soaps in these conditions.

Evaluate the statement about residue: Soaps can interact with minerals in hard water, forming a precipitate known as soap scum, which can leave a residue.

Analyze the statement about killing microbes: Soaps and detergents primarily function as cleaning agents by removing dirt and oils. They are not typically considered sterilants, which are agents that kill all forms of microbial life, including spores.