Question 1

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

Question 2

Which of the following is an unsaturated fatty acid?

Accepted Answer

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

Question 3

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

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

Question 5

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)  
  
A)  
  
B)  
  
C)  
  
D)  
  
E)

Question 6

Choose the polyunsaturated triacylglycerol from the compounds below.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 7

The tail of a triacylglycerol is the nonpolar end.

Accepted Answer

A) True 
 B)False

Question 8

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

Accepted Answer

A) True 
 B)False

Question 9

Choose the saturated triacylglycerol from the compounds below.

Accepted Answer

A)    
B)    
C)    
D)    
E)    
A)    
B)    
C)    
D)    
E)

Question 10

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

Question 11

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

Question 12

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

Question 13

A precursor of prostaglandins is ________ acid.

Accepted Answer

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

Question 14

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

Question 15

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. 
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 16

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

Question 17

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

Accepted Answer

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

Question 18

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

Question 19

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

Question 20

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. 
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.

Exam 17: Lipids

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

Which of the following is an unsaturated fatty acid?

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

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

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

Choose the polyunsaturated triacylglycerol from the compounds below.

The tail of a triacylglycerol is the nonpolar end.

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

Choose the saturated triacylglycerol from the compounds below.

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

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

Which of the following is NOT a function of glycerophospholipids?

A precursor of prostaglandins is ________ acid.

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

Channel proteins in cell membranes serve what function?

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

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

The most common type of gallstones is composed of almost pure

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

Margarine containing partially hydrogenated soybean oil is solid because

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