Question 1

Which of the following fatty acids is classified as a saturated fatty acid?

Accepted Answer

Stearic acid

Question 2

Given the structure below, identify the acyl group name for a fatty acid with the formula $$\mathrm{C16:0}.$$

Accepted Answer

palmitoyl

Question 3

A triglyceride (TAG) is formed from two palmitic acids and one oleic acid. What is the correct name for this TAG?

Accepted Answer

1,2-dipalmitoyl-3-oleoyl glycerol

Question 4

Which of the following is the correct delta ($$\Delta) $$nomenclature for linoleic acid?

Accepted Answer

$$\mathrm{C18:2\Delta9,12}$$

Question 5

Which lipid is specifically identified as phosphatidylcholine?

Accepted Answer

A glycerophospholipid with a choline head group

Question 6

A membrane lipid is hydrolyzed to yield 1 equivalent each of glycerol, phosphate, and choline, and 2 equivalents of oleic acid. What type of lipid is this?

Accepted Answer

Phosphatidylcholine (lecithin)

Question 7

Which of the following is a characteristic feature of a plasmalogen?

Accepted Answer

Contains a vinyl ether linkage at the sn-1 position

Question 8

Which of the following correctly describes the structure of a sphingomyelin?

Accepted Answer

A sphingolipid containing a choline group and a phosphate group

Question 9

Which fatty acid is a component of a biological wax made from palmitic acid?

Accepted Answer

Palmitic acid ($$\mathrm{C16:0})$$

Question 10

Which of the following is true about the hydrophobic and hydrophilic regions of a phospholipid?

Accepted Answer

The fatty acid tails are hydrophobic, and the phosphate head group is hydrophilic.

Question 11

Which of the following is the correct omega ($$\omega) $$nomenclature for linolenic acid?

Accepted Answer

$$\mathrm{C18:3\omega3,6,9}$$

Question 12

Which of the following is NOT a head group found in glycerophospholipids?

Accepted Answer

Glucose

Question 13

A lipid structure contains a 16-carbon ether tail, an acetyl group at C2, and a phosphocholine head group. What type of lipid is this?

Accepted Answer

Ether glycerophospholipid

Question 14

Which of the following is a distinguishing feature between a cerebroside and a ganglioside?

Accepted Answer

Gangliosides contain one or more sialic acid residues, while cerebrosides do not.

Question 15

Which of the following is the correct name for a glycerophospholipid with a serine head group?

Accepted Answer

Phosphatidylserine

Question 16

Which of the following is true about the structure of triacylglycerols?

Accepted Answer

They contain three fatty acid chains esterified to a glycerol backbone.

Question 17

Which of the following is a correct description of a biological wax?

Accepted Answer

An ester formed from a long-chain fatty acid and a long-chain alcohol.

Question 18

Which of the following is the correct formula for stearic acid?

Accepted Answer

$$\mathrm{C18:0}$$

Question 19

Which of the following is a correct description of phosphatidylethanolamine?

Accepted Answer

A glycerophospholipid with an ethanolamine head group

Question 20

Which of the following is true about the structure of arachidonic acid?

Accepted Answer

It contains four double bonds and has the formula $$\mathrm{C20:4\Delta5,8,11,14}.$$

Study Notes: Lipid Structures and Nomenclature

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