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

5. Molecules of Microbiology

Lipids

Microbiology

5. Molecules of Microbiology

Lipids

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Multiple Choice

How do phospholipids interact with water molecules?
a) The polar heads avoid water; the nonpolar tails attract water (because water is polar and opposites attract).
b) Phospholipids do not interact with water because water is polar and lipids are nonpolar.
c) The polar heads interact with water; the nonpolar tails do not.
d) Phospholipids dissolve in water.

The polar heads avoid water; the nonpolar tails attract water (because water is polar and opposites attract).

Phospholipids do not interact with water because water is polar and lipids are nonpolar.

The polar heads interact with water; the nonpolar tails do not.

Phospholipids dissolve in water.

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Verified step by step guidance

Understand the structure of phospholipids: Phospholipids are composed of a hydrophilic (water-attracting) 'head' and two hydrophobic (water-repelling) 'tails'.

Recognize the nature of water: Water is a polar molecule, meaning it has a partial positive charge on one side and a partial negative charge on the other, which allows it to interact with other polar molecules.

Analyze the interaction between phospholipids and water: The hydrophilic heads of phospholipids are attracted to water molecules due to their polar nature, allowing them to interact with water.

Consider the behavior of the hydrophobic tails: The nonpolar tails of phospholipids do not interact with water and tend to avoid it, often leading to the formation of structures like micelles or bilayers where the tails are shielded from water.

Conclude the correct interaction: Based on the above analysis, the polar heads of phospholipids interact with water, while the nonpolar tails do not, making option c the correct answer.