Chapter 21

Question 1

A saturated hydrocarbon is one

Answer 1

whose carbons have the maximum number of hydrogens.

Question 2

Which is NOT classified as a simple lipid?

A) fats

B) oils

C) steroids

D) waxes

Answer 2

Steroids

Question 3

Which of the following is NOT one of the four groups into which lipids are classified?

A) sugars

B) complex

C) steroids

D) prostoglandins

Answer 3

Sugars

Question 4

Which of the following is a function of lipids?

A) They store energy within cells.

B) They serve as chemical messengers.

C) They serve as components of cell membranes.

D) All of these are functions of lipids

Answer 4

All of these are functions of lipids

Question 5

Which of the following statements is true of pure fats and oils?

A) They have characteristic color but lack odor and taste.

B) They have characteristic odor but lack color and taste.

C) They have characteristic taste but lack odor and color.

D) They are colorless, odorless, and tasteless substances.

Answer 5

They are colorless, odorless, and tasteless

Question 6

How are the hydrophilic heads and hydrophobic tails of complex lipids distributed in the lipid bilayer?

Answer 6

The hydrophilic heads project to the exterior of the cell, and the hydrophobic tails project to the cytoplasm (interior of the cell).

Question 7

Which of the following is a role of cholesterol?

A) to serve as a component of plasma membranes

B) to serve as a starting material for the synthesis of steroid hormones

C) to serve as a precursor for the synthesis of bile salts

D) all of these

Answer 7

All of these

Question 8

What is the correct classification

Answer 8

Simple lipid

Question 9

What is the correct classification

Answer 9

Phospholipid

Question 10

What is the correct classification

Answer 10

Glycolipid

Question 11

Hydrogenation occurs when

Answer 11

double or triple bonds between carbon atoms in a chain are broken and hydrogens are added to the carbons.

Question 12

What is the base component of a triglyceride?

Answer 12

Glycerol

Question 13

Which of the following lipoproteins are commonly called “good cholesterol”?

A) chylomicrons

B) HDLs

C) LDLs

D) VLDLs

Answer 13

HDLs

Question 14

Which of the following is a difference between a glycolipid and a sphingolipid?

A) Only one of them contains a sphingosine molecule.

B) Only one of them contains a fatty acid.

C) Only one of them contains a phosphate group.

D) Only one of them contains a carbohydrate molecule.

Answer 14

Only one of them contains a carbohydrate molecule

Question 15

Which number in the diagram represents an unsaturated fatty acid?

Answer 15

1

Question 16

Which of the following is the most common steroid?

A) cholesterol

B) sphingosine

C) glyerophospholipids

D) glycolipids

Answer 16

Cholesterol

Question 17

Where does the synthesis of cholesterol occur in the body?

Answer 17

in the liver

Question 18

Which of the following is a role of cholesterol?

A) to serve as a component of plasma membranes

B) to serve as a starting material for the synthesis of steroid hormones

C) to serve as a precursor for the synthesis of bile salts

D) all of these

Answer 18

All of these

Question 19

What is this a basic ring structure of

Answer 19

Steroid

Question 20

Prostaglandins, thromboxanes, and leukotrienes are all derived from ______________________.

Answer 20

arachidonic acid

Question 21

Which of the following is NOT one of the things on which prostaglandins, thromboxanes, and leukotrienes have an effect on body chemistry?

A) lowering blood pressure

B) blood clotting

C) metiate hormone action

D) all of these

Answer 21

All of these