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Chapter 15: Q. 15.1 (page 510)

Lipids are not soluble in water. Are lipids polar or nonpolar molecules?

Short Answer

Expert verified

The lipids are nonpolar molecules.

Step by step solution

01

An Introduction

Lipids are an organic chemical class that is largely insoluble in water. Lipids are molecules that are composed mostly of carbon, hydrogen, and oxygen and are composed of fats and oils. Triacylglycerols, phospholipids, and sterols are the three primary forms of lipids.

02

Given Information

Lipids are not soluble in water.
We have to find lipids are polar or nonpolar molecules.

03

Determine if lipids are polar or nonpolar molecules 

There is an easily memorable rule when it comes to dissolving a compound: slmllar dlssolves simllar.

This means that polar solvents dissolve polar compounds, while nonpolar solvents dissolve nonpolar compounds.

As you know, water is a polar solvent. It does not dissolve llplds. Therefore, llplds are nonpolar molecules.

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Most popular questions from this chapter

Which of the following are found in cell membranes?

a. cholesterol

b. triacylglycerols

c. carbohydrates

Why is LDL called "bad" cholesterol?

Using the Internet, look up the condensed structural formulas for the following medicinal drugs and list the functional groups in the compounds:

a. baclofen, a muscle relaxant

b. anethole, a licorice flavoring agent in anise and fennel

c. alibendol, an antispasmodic drug

d. pargyline, an antihypertensive drug

e. naproxen, a nonsteroidal anti-inflammatory drug

Draw the condensed structural formula for the cephalin that contains glycerol, two palmitic acids, phosphate, and ethanolamine (ionized).

Match the lipoprotein ( 1to 4) with its description (a to d).

1. chylomicrons

2. VLDL

3. LDL

4. HDL

a. has the greatest abundance of protein

b. "bad" cholesterol

c. carries triacylglycerols synthesized in the liver to the muscles

d. has the lowest density
See all solutions

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