Question 1

Which of the following is NOT a lipid?

Accepted Answer

A) oleic acid 
B) cholesterol 
C) carnuba wax 
D) DNA 
E) lecithin 
A) oleic acid 
B) cholesterol 
C) carnuba wax 
D) DNA 
E) lecithin

Question 2

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

Accepted Answer

A) hydrogenation 
B) reduction 
C) hydration 
D) oxidation 
E) saponification 
A) hydrogenation 
B) reduction 
C) hydration 
D) oxidation 
E) saponification

Question 3

Which of the following lipids will give no 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

Question 4

The interior of a lipid bilayer is the hydrophilic region.

Accepted Answer

A) True 
 B)False

Question 5

Lipids are compounds that are soluble in

Accepted Answer

A) distilled water. 
B) normal saline solution. 
C) glucose solution. 
D) chloroform. 
E) oxygen. 
A) distilled water. 
B) normal saline solution. 
C) glucose solution. 
D) chloroform. 
E) oxygen.

Question 6

Palmitic acid is an unsaturated fatty acid.

Accepted Answer

A) True 
 B)False

Question 7

A lecithin contains which of the following components?

Accepted Answer

A) glycerol and three fatty acids 
B) glycerol, two fatty acids and choline 
C) glycerol, two fatty acids, phosphate and an amino alcohol 
D) sphingosine, two fatty acids, phosphate and an amino alcohol 
E) sphingosine, one fatty acid, phosphate and an amino alcohol 
A) glycerol and three fatty acids 
B) glycerol, two fatty acids and choline 
C) glycerol, two fatty acids, phosphate and an amino alcohol 
D) sphingosine, two fatty acids, phosphate and an amino alcohol 
E) sphingosine, one fatty acid, phosphate and an amino alcohol

Question 8

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

Accepted Answer

A) steroid. 
B) hydrophobic region. 
C) phospholipid. 
D) mitochondrion. 
E) glycolipid. 
A) steroid. 
B) hydrophobic region. 
C) phospholipid. 
D) mitochondrion. 
E) glycolipid.

Question 9

What phospholipid contains fatty acids but NOT glycerol?

Accepted Answer

A) lecithin 
B) glycolipid 
C) sphingolipid 
D) cephalin 
E) corticosteroid 
A) lecithin 
B) glycolipid 
C) sphingolipid 
D) cephalin 
E) corticosteroid

Question 10

In the lipid bilayer of a cell membrane

Accepted Answer

A) the hydrophobic heads are on the inner and outer surface and the hydrophilic tails in the middle. 
B) the hydrophilic heads are on the inner and outer surface and the hydrophobic tails in the middle. 
C) there is a random arrangement of phospholipids. 
D) the hydrophilic heads are on the inner and outer surface and cholesterol is in the middle. 
E) cholesterol is on the inner and outer surface and phospholipids are in the middle. 
A) the hydrophobic heads are on the inner and outer surface and the hydrophilic tails in the middle. 
B) the hydrophilic heads are on the inner and outer surface and the hydrophobic tails in the middle. 
C) there is a random arrangement of phospholipids. 
D) the hydrophilic heads are on the inner and outer surface and cholesterol is in the middle. 
E) cholesterol is on the inner and outer surface and phospholipids are in the middle.

Question 11

A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the percentage of total kilocalories due to fat (1 gram of fat = 9 kcal).

Accepted Answer

A) 0.68% of total kilocalories 
B) 6.1% of total kilocalories 
C) 11% of total kilocalories 
D) 55% of total kilocalories 
E) 100% of total kilocalories 
A) 0.68% of total kilocalories 
B) 6.1% of total kilocalories 
C) 11% of total kilocalories 
D) 55% of total kilocalories 
E) 100% of total kilocalories

Question 12

Which of the following compounds is a glycerolphospholipid?

Accepted Answer

A) jojoba wax 
B) estrogen 
C) lecithin 
D) triolein 
E) cerebroside 
A) jojoba wax 
B) estrogen 
C) lecithin 
D) triolein 
E) cerebroside

Question 13

Most plant lipids are saturated lipids.

Accepted Answer

A) True 
 B)False

Question 14

The catalyst needed for saponification is H+ ion.

Accepted Answer

A) True 
 B)False

Question 15

In the fluid-mosaic model that describes plasma membranes,

Accepted Answer

A) there are three layers of glycerophospholipid molecules. 
B) two layers of glycerophospholipid molecules have their nonpolar sections oriented to the inside of the membrane. 
C) two layers of glycerophospholipid molecules have their nonpolar sections along the outer surface of the membrane. 
D) A single row of glycerophospholipid molecules forms a barrier between the inside and outside of the cell. 
E) two layers of proteins separate the contents inside a cell from the surrounding fluids. 
A) there are three layers of glycerophospholipid molecules. 
B) two layers of glycerophospholipid molecules have their nonpolar sections oriented to the inside of the membrane. 
C) two layers of glycerophospholipid molecules have their nonpolar sections along the outer surface of the membrane. 
D) A single row of glycerophospholipid molecules forms a barrier between the inside and outside of the cell. 
E) two layers of proteins separate the contents inside a cell from the surrounding fluids.

Question 16

Bile salts are among the lipid class known as ________.

Accepted Answer

A) sphingosides 
B) prostaglandins 
C) cerebrosides 
D) triacylglycerols 
E) steroids 
A) sphingosides 
B) prostaglandins 
C) cerebrosides 
D) triacylglycerols 
E) steroids

Question 17

A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the number of kilocalories from fat (1 gram of fat = 9 kcal).

Accepted Answer

A) 4.3 kcal from fat 
B) 39 kcal from fat 
C) 71 kcal from fat 
D) 350 kcal from fat 
E) 640 kcal from fat 
A) 4.3 kcal from fat 
B) 39 kcal from fat 
C) 71 kcal from fat 
D) 350 kcal from fat 
E) 640 kcal from fat

Question 18

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

Accepted Answer

A) they have fewer hydrogen atoms. 
B) they have more hydrogen atoms. 
C) their molecules fit closely together. 
D) the cis double bonds give them an irregular shape. 
E) the trans double bonds give them an irregular shape. 
A) they have fewer hydrogen atoms. 
B) they have more hydrogen atoms. 
C) their molecules fit closely together. 
D) the cis double bonds give them an irregular shape. 
E) the trans double bonds give them an irregular shape.

Question 19

The products of this reaction is

Accepted Answer

A) glyceryl trioleate 
B) glyceryl trisrearate 
C) glyceryl tripalmitate 
D) fat. 
E) glyceryl tricaprate. 
A) glyceryl trioleate 
B) glyceryl trisrearate 
C) glyceryl tripalmitate 
D) fat. 
E) glyceryl tricaprate.

Question 20

Choose the saturated fatty acid from the compounds below.

Accepted Answer

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

Exam 17: Lipids

Which of the following is NOT a lipid?

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

Which of the following lipids will give no fatty acid when hydrolyzed?

The interior of a lipid bilayer is the hydrophilic region.

Lipids are compounds that are soluble in

Palmitic acid is an unsaturated fatty acid.

A lecithin contains which of the following components?

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

What phospholipid contains fatty acids but NOT glycerol?

In the lipid bilayer of a cell membrane

A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the percentage of total kilocalories due to fat (1 gram of fat = 9 kcal).

Which of the following compounds is a glycerolphospholipid?

Most plant lipids are saturated lipids.

The catalyst needed for saponification is H+ ion.

In the fluid-mosaic model that describes plasma membranes,

Bile salts are among the lipid class known as ________.

A double cheeseburger with bacon contains 640 kcal and 39 g of fat. Calculate the number of kilocalories from fat (1 gram of fat = 9 kcal).

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

The products of this reaction is

Choose the saturated fatty acid from the compounds below.

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