Question 1

In the list below, which lipid type is most soluble in water?

Accepted Answer

A)  triacylglycerols
B)  glycerophospholipids
C)  oils
D)  steroids
E)  waxes

Question 2

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

Accepted Answer

A)  hydrogenation.
B)  hydrolysis.
C)  hydration.
D)  oxidation.
E)  saponification.

Question 3

Hydrogenation of the double bonds in unsaturated fats requires a catalyst.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A)  cholesterol
B)  carnauba wax
C)  stearic acid
D)  glycerol
E)  sphingosine

Question 5

Which of the following lipids will give a single molecule of fatty acid when hydrolyzed?

Accepted Answer

A)  wax
B)  fat
C)  phospholipid
D)  glycolipid
E)  cholesterol A

Question 6

Margarine containing partially hydrogenated soybean oil is solid because

Accepted Answer

A)  it contains only saturated fats.
B)  it contains only trans fatty acids.
C)  some of its double bonds have been converted to single bonds.
D)  it contains only cis double bonds.
E)  it contains only polyunsaturated fatty acids.

Question 7

Channel proteins in cell membranes serve what function?

Accepted Answer

A)  They add strength and rigidity to the membrane.
B)  They provide pathways for water and electrolytes to move through cell membranes.
C)  They form the bilayer portion of the membrane.
D)  They allow nonpolar substances to move through the membrane.
E)  They prevent interactions between the nonpolar tails of the phospholipids which gives the membrane its fluidity.

Question 8

Which of the following is NOT a function of glycerophospholipids?

Accepted Answer

A)  transport of triacylglycerols
B)  regulation of cellular permeability
C)  protect nerve cells
D)  aid in digestion
E)  transport of cholesterol

Question 9

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

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 10

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

Accepted Answer

A)  steroids.
B)  hydrophobic regions.
C)  proteins.
D)  phospholipids.
E)  carbohydrate side chains. C

Question 11

Choose the polyunsaturated triacylglycerol from the compounds below.

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 12

The type of lipid that gives a cell membrane its shape is a

Accepted Answer

A)  triacylglycerol.
B)  glycerophospholipid.
C)  prostaglandin.
D)  bile salt.
E)  wax.

Question 13

Which of the following is NOT a function of lipids in the human body?

Accepted Answer

A)  energy storage
B)  insulation
C)  protection
D)  emulsification
E)  pH regulation

Question 14

The most common type of gallstones is composed of almost pure

Accepted Answer

A)  cholesterol.
B)  bile salts.
C)  glycerophospholipids.
D)  calcium salts of fatty acids.
E)  anabolic steroids.

Question 15

Which of the following is an unsaturated fatty acid?

Accepted Answer

A)  myristic
B)  oleic
C)  palmitic
D)  stearic
E)  lauric B

Question 16

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

Accepted Answer

A)  a lipid bilayer.
B)  a membrane protein.
C)  a glycoprotein.
D)  a steroid.
E)  a prostaglandin.

Question 17

Choose the saturated triacylglycerol from the compounds below.

Accepted Answer

A)   
B)   
C)   
D)   
E)

Question 18

A precursor of prostaglandins is ________ acid.

Accepted Answer

A)  oleic
B)  linoleic
C)  arachidonic
D)  tauric
E)  palmitic

Question 19

The tail of a triacylglycerol is the nonpolar end.

Accepted Answer

A) True 
 B)False

Question 20

For the question(s)  that follow, identify the class of lipid to which each of the following molecules belongs.
-

Accepted Answer

A)  wax
B)  triacylglycerol
C)  glycerolphospholipid
D)  glycosphingolipid
E)  steroid

Exam 17: Lipids

In the list below, which lipid type is most soluble in water?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Hydrogenation of the double bonds in unsaturated fats requires a catalyst.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Which of the following lipids will give a single molecule of fatty acid when hydrolyzed?

Correct AnswerverifiedA

Margarine containing partially hydrogenated soybean oil is solid because

Correct AnswerverifiedShow Answer

Channel proteins in cell membranes serve what function?

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of glycerophospholipids?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedC

Choose the polyunsaturated triacylglycerol from the compounds below.

Correct AnswerverifiedShow Answer

The type of lipid that gives a cell membrane its shape is a

Correct AnswerverifiedShow Answer

Which of the following is NOT a function of lipids in the human body?

Correct AnswerverifiedShow Answer

The most common type of gallstones is composed of almost pure

Correct AnswerverifiedShow Answer

Which of the following is an unsaturated fatty acid?

Correct AnswerverifiedB

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

Correct AnswerverifiedShow Answer

Choose the saturated triacylglycerol from the compounds below.

Correct AnswerverifiedShow Answer

A precursor of prostaglandins is ________ acid.

Correct AnswerverifiedShow Answer

The tail of a triacylglycerol is the nonpolar end.

Correct AnswerverifiedShow Answer

For the question(s) that follow, identify the class of lipid to which each of the following molecules belongs. -

Correct AnswerverifiedShow Answer

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A

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C

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B

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