w. 4 ch 15 lipids

Question 1

Which statement is not true?

Answer 1

all lipids contain fatty acids

Question 2

Lipids are compounds that are soluble in _____.

Answer 2

dichloroform

Question 3

Which of the following is a lipid?

Answer 3

cholesterol

Question 4

A polyunsaturated fatty acid contains more than one _____.

Answer 4

carbon-carbon double bond

Question 5

The skeletal structure of palmitoleic acid is shown below. Palmitoleic acid is a _____.

Answer 5

monounsaturated fatty acid

Question 6

Unsaturated fatty acids have lower melting points than saturated fatty acids because ______.

Answer 6

the cis double bonds give them an irregular shape

Question 7

Which of the following is an unsaturated fatty acid?

Answer 7

oleic

Question 8

Which of the following fatty acids is most likely to be a solid at room temperature?

Answer 8

stearic

Question 9

Compared to saturated fatty acids, unsaturated fatty acids have _____.

Answer 9

lower melting points

Question 10

Waxes are lipids derived from ____.

Answer 10

a long-chain alcohol and a long-chain fatty acid

Question 11

The skeletal structure below is that of a ______.

Answer 11

wax

Question 12

A triacylglycerol that is solid at room temperature is called a _____.

Answer 12

fat

Question 13

Which of the following lipids will give a long-chain alcohol when hydrolyzed?

Answer 13

wax

Question 14

Commercially, liquid vegetable oils are converted to solid fats such as margarine by ____.

Answer 14

hydrogenation

Question 15

Margarine containing partially hydrogenated soybean oil is solid because ____.

Answer 15

some of its double bonds have been converted to single bonds

Question 16

Palmitic acid is a 16-carbon acid. In a balanced equation, the products of the saponification of tripalmitin (glyceryl tripalmitate) are ____.

Answer 16

Question 17

The products of the acid-catalyzed hydrolysis of a fat are ______.

Answer 17

fatty acids and glycerol

Question 18

A double cheeseburger with bacon contains 39 g of fat. Calculate the number of kilocalories from fat. (1 gram of fat = 9 kcal) Round answers to the tens place.

Answer 18

350 kcal from fat

Question 19

Glycerophospholipids can interact both with other lipids and water because they contain _____.

Answer 19

polar regions and nonpolar regions

Question 20

The components in the following glycerophospholipid are _____.

Answer 20

glycerol, palmitic acid, phosphate, and serine

Question 21

Which of the lipid types listed below is most soluble in water?

Answer 21

glycerolphospholipids

Question 22

Which of the following compounds is a glycerophospholipid?

Answer 22

lecithin

Question 23

Which of the following is not a function of glycerophospholipids?

Answer 23

aid in digestion

Question 24

The main lipid components in cellular membranes are _____.

Answer 24

glycerophospholipids

Question 25

The most common type of gallstones is composed of almost pure _____.

Answer 25

cholesterol

Question 26

Which of the following is not a lipoprotein that carries nonpolar lipids through the bloodstream?

Answer 26

glycerol

Question 27

The steroid hormone that increases the blood glucose and glycogen levels from fatty acids and amino acids is _____.

Answer 27

cortisone

Question 28

A lipoprotein particle functions to _____.

Answer 28

transport nonpolar lipids to body cells

Question 29

Synthesis of cholesterol takes place in the _____.

Answer 29

liver

Question 30

Answer 30

triacylglycerol

Question 31

Answer 31

glycerophospholipid

Question 32

Answer 32

steroid

Question 33

According to the fluid-mosaic model of a cell membrane, the main component of a membrane is _____.

Answer 33

a lipid bilayer

Question 34

The type of lipid that gives a cell membrane its structure is a _____.

Answer 34

glycerophospholipid

Question 35

In this diagram of a cell membrane, the small branched object labeled (A) is part of a _____.

Answer 35

carbohydrate side chain

Question 36

In this diagram of a cell membrane, the objects labeled (E) are _____.

Answer 36

proteins

Question 37

In this diagram of a cell membrane, the object labeled (C) is a ______.

Answer 37

glycerophospholipid

Question 38

In this diagram of a cell membrane, the object labeled (B) is a ______.

Answer 38

phospholipid bilayer

Question 39

In the fluid-mosaic model that describes cell membranes, ______.

Answer 39

two layers of phospholipid molecules have their nonpolar sections oriented to the inside of the membrane

Question 40

Which of the following is an unsaturated fatty acid?

Answer 40

oleic

Question 41

Which of the following is a saturated fatty acid?

Answer 41

stearic

Question 42

Which of the following is a polyunsaturated fatty acid?

Answer 42

linoleic

Question 43

Prostaglandins are formed from _____ acid.

Answer 43

arachidonic

Question 44

The name of the reaction that occurs when a fat reacts with sodium hydroxide and water is _____.

Answer 44

saponification

Question 45

Cholesterol belongs to the _____ group of lipids.

Answer 45

steroid

Question 46

In a simple model of atherosclerosis and heart disease, the compound that forms plaques that adhere to the walls of the blood vessels is _____.

Answer 46

cholesterol