Chapter 03 Core Content: The Molecules of Cells Building Vocabulary: Lipids 1 of

Question

Chapter 03 Core Content: The Molecules of Cells Building Vocabulary: Lipids 1 of 9 > hydrophobic unsaturated fatty acids glycerol carboxyl group steroids 1. Lipids are diverse compounds that are grouped together because they are 2. A fat molecule is composed of two types of smaller molecules: and fatty aclds. 3. A fatty acid consists of a and a long hydrocarbon chain. have one or more double bonds in their hydrocarbon chains and are usually found in vegetable oils. hydrophilic saturated fatty acids phospholipids 5. The hydrocarbon chains of are not kinked, and thus pack closely together, making animal fats solid at room temperature. 6. hydrophobic tails mingling together and their hydrophilic heads facing the watery environment on both sides of the membrane. are a major component of cell membranes. They form a bilayer with their are lipids with a structure consisting of four fused rings. Many sex hormones are made from this type of lipid

Explanation / Answer

1 .Hydrophobic. All lipids are hydrophobic due to long hydrocarbon chain fatty acids.

2. Glycerol. Fats are also called triacylglycerols in which fatty acids are attached to glycerol molecule via ester bonds

3. carboxyl group. Fatty acids have long chain hydrocarbons attached to one carboxyl group.

4. Unsaturated fatty acids. The double in their hydrocarbon change produce kink in the molecule thereby not allowing individual fatty acids to pack closely and giving liquid like consistency to them.

5. Saturated fats

6.Phospholipids .Membranes consist of phospholipid bilayer.

7. steroids. Cholesterol is a steroid with four fused rings and acts a precursor hormones like : testosterone, estrogen, cortisol, cortiocsterone, aldosterone.

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