Question 1

Which of the following statements is true of lipids?

Accepted Answer

A)  They have a specific functional group. 
B)  They are the least diverse class of biomolecules. 
C)  They are soluble in diethyl ether. 
D)  They are mostly defined by their structure. 
A)  They have a specific functional group. 
B)  They are the least diverse class of biomolecules. 
C)  They are soluble in diethyl ether. 
D)  They are mostly defined by their structure.

Question 2

Which of the following lipoproteins carry the highest percentage (dry weight) of cholesterol?

Accepted Answer

A)  HDLs 
B)  LDLs 
C)  VLDLs 
D)  chylomicrons 
A)  HDLs 
B)  LDLs 
C)  VLDLs 
D)  chylomicrons

Question 3

Which of the following physiological processes involves bile salts?

Accepted Answer

A)  digestion 
B)  the removal of excess cholesterol 
C)  both digestion and the removal of excess cholesterol 
D)  neither digestion nor the removal of excess cholesterol 
A)  digestion 
B)  the removal of excess cholesterol 
C)  both digestion and the removal of excess cholesterol 
D)  neither digestion nor the removal of excess cholesterol

Question 4

Which type of transport does the sodium-potassium pump enable?

Accepted Answer

A)  primary active transport 
B)  secondary active transport 
C)  simple diffusion 
D)  facilitated diffusion 
A)  primary active transport 
B)  secondary active transport 
C)  simple diffusion 
D)  facilitated diffusion

Question 5

Which hormone triggers ovulation?

Accepted Answer

A)  estradiol 
B)  luteinizing hormone 
C)  progesterone 
D)  none of these 
A)  estradiol 
B)  luteinizing hormone 
C)  progesterone 
D)  none of these

Question 6

Which of the following fatty acids is the least abundant in higher plants and animals?

Accepted Answer

A)  palmitic acid 
B)  stearic acid 
C)  oleic acid 
D)  linolenic acid 
A)  palmitic acid 
B)  stearic acid 
C)  oleic acid 
D)  linolenic acid

Question 7

Which of the following fatty acids has the lowest melting point?

Accepted Answer

A)  stearic acid 
B)  oleic acid 
C)  linoleic acid 
D)  linolenic acid 
A)  stearic acid 
B)  oleic acid 
C)  linoleic acid 
D)  linolenic acid

Question 8

Which of the following compounds is found in all types of complex lipids?

Accepted Answer

A)  a fatty acid 
B)  glycerol 
C)  a phosphate group 
D)  all of these 
A)  a fatty acid 
B)  glycerol 
C)  a phosphate group 
D)  all of these

Question 9

Which of the following lipoproteins transport cholesterol to the liver?

Accepted Answer

A)  chylomicrons 
B)  HDLs 
C)  LDLs 
D)  VLDLs 
A)  chylomicrons 
B)  HDLs 
C)  LDLs 
D)  VLDLs

Question 10

Which of the following statements is true of the calorific value of fats compared with that of carbohydrates?

Accepted Answer

A)  The burning of both fatsand carbohydrates produces about 4 kcal/g of energy. 
B)  The burning of both fatsand carbohydrates produces about 9 kcal/g of energy. 
C)  The burning of carbohydrates produces about 4 kcal/g, whereasthe burning of fatsproduces about 9 kcal/g of energy. 
D)  The burning of carbohydrates produces about 9 kcal/g, whereas the burning of fats produces about 4 kcal/g of energy. 
A)  The burning of both fatsand carbohydrates produces about 4 kcal/g of energy. 
B)  The burning of both fatsand carbohydrates produces about 9 kcal/g of energy. 
C)  The burning of carbohydrates produces about 4 kcal/g, whereasthe burning of fatsproduces about 9 kcal/g of energy. 
D)  The burning of carbohydrates produces about 9 kcal/g, whereas the burning of fats produces about 4 kcal/g of energy.

Question 11

To which class of compounds do waxes belong?

Accepted Answer

A)  alcohols 
B)  carboxylic acids 
C)  esters 
D)  ethers 
A)  alcohols 
B)  carboxylic acids 
C)  esters 
D)  ethers

Question 12

How do bile salts remove excess cholesterol from the body?

Accepted Answer

A)  Bile salts solubilize deposited cholesterol. 
B)  Cholesterol is converted to bile salts that are later eliminated through feces. 
C)  Both of these processes remove excess cholesterol from the body. 
D)  None of these processes remove excess cholesterol from the body. 
A)  Bile salts solubilize deposited cholesterol. 
B)  Cholesterol is converted to bile salts that are later eliminated through feces. 
C)  Both of these processes remove excess cholesterol from the body. 
D)  None of these processes remove excess cholesterol from the body.

Question 13

In which of the following body structures are cerebrosides found?

Accepted Answer

A)  osteocytes 
B)  skeletal tissues 
C)  nerve synapses 
D)  nephrocytes 
A)  osteocytes 
B)  skeletal tissues 
C)  nerve synapses 
D)  nephrocytes

Question 14

Which of the following unsaturated fatty acids has four double bonds?

Accepted Answer

A)  lauric acid 
B)  myristic acid 
C)  arachidonic acid 
D)  palmitoleic acid 
A)  lauric acid 
B)  myristic acid 
C)  arachidonic acid 
D)  palmitoleic acid

Question 15

Which of the following compounds are exclusively found in glycolipids?

Accepted Answer

A)  carbohydrates 
B)  phosphate groups 
C)  amines 
D)  hydroxyl groups 
A)  carbohydrates 
B)  phosphate groups 
C)  amines 
D)  hydroxyl groups

Question 16

Which of the following is found in thromboxanes?

Accepted Answer

A)  a β-lactam ring 
B)  a cyclic acetal group 
C)  a cyclic ether group 
D)  none of these 
A)  a β-lactam ring 
B)  a cyclic acetal group 
C)  a cyclic ether group 
D)  none of these

Question 17

What is an essential fatty acid?

Accepted Answer

A)  A fatty acid that the body can synthesize from precursor molecules 
B)  A fatty acid that must be a part of our diet since we cannot synthesize it 
C)  Both of these 
D)  None of these 
A)  A fatty acid that the body can synthesize from precursor molecules 
B)  A fatty acid that must be a part of our diet since we cannot synthesize it 
C)  Both of these 
D)  None of these

Question 18

Which of the following is a characteristic of fatty acids?

Accepted Answer

A)  Most fatty acids have an odd number of carbon atoms. 
B)  Trans isomers of unsaturated fatty acids are common. 
C)  Unsaturated fatty acids have lower melting points than saturated fatty acids. 
D)  None of these are a characteristic of fatty acids. 
A)  Most fatty acids have an odd number of carbon atoms. 
B)  Trans isomers of unsaturated fatty acids are common. 
C)  Unsaturated fatty acids have lower melting points than saturated fatty acids. 
D)  None of these are a characteristic of fatty acids.

Question 19

Which structural feature is associated with the prostaglandin E group (PGE)?

Accepted Answer

A)  a carbonyl group at carbon 9 
B)  a carboxylate group at carbon 9 
C)  a hydroxyl group at carbon 9 
D)  none of these 
A)  a carbonyl group at carbon 9 
B)  a carboxylate group at carbon 9 
C)  a hydroxyl group at carbon 9 
D)  none of these

Question 20

Cell membranes are composed of _____.

Accepted Answer

A)  lipid bilayers 
B)  protein bilayers 
C)  lipid trilayers 
D)  protein trilayers 
A)  lipid bilayers 
B)  protein bilayers 
C)  lipid trilayers 
D)  protein trilayers

Exam 20: Lipids

Which of the following statements is true of lipids?

Which of the following lipoproteins carry the highest percentage (dry weight) of cholesterol?

Which of the following physiological processes involves bile salts?

Which type of transport does the sodium-potassium pump enable?

Which hormone triggers ovulation?

Which of the following fatty acids is the least abundant in higher plants and animals?

Which of the following fatty acids has the lowest melting point?

Which of the following compounds is found in all types of complex lipids?

Which of the following lipoproteins transport cholesterol to the liver?

Which of the following statements is true of the calorific value of fats compared with that of carbohydrates?

To which class of compounds do waxes belong?

How do bile salts remove excess cholesterol from the body?

In which of the following body structures are cerebrosides found?

Which of the following unsaturated fatty acids has four double bonds?

Which of the following compounds are exclusively found in glycolipids?

Which of the following is found in thromboxanes?

What is an essential fatty acid?

Which of the following is a characteristic of fatty acids?

Which structural feature is associated with the prostaglandin E group (PGE)?

Cell membranes are composed of _____.

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

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