Question 1

To which class of complex lipids does myelin, the coating of nerve axons, belong?

Accepted Answer

A)  glycerophospholipids 
B)  glycolipids 
C)  sphingolipids 
D)  none of these 
A)  glycerophospholipids 
B)  glycolipids 
C)  sphingolipids 
D)  none of these

Question 2

Which of the following statements is true of fatty acids?

Accepted Answer

A)  They are amphipathic compounds. 
B)  They have a hydrophobic carboxyl group. 
C)  They have a hydrophilic hydrocarbon tail. 
D)  They are soluble in polar solvents such as water. 
A)  They are amphipathic compounds. 
B)  They have a hydrophobic carboxyl group. 
C)  They have a hydrophilic hydrocarbon tail. 
D)  They are soluble in polar solvents such as water.

Question 3

How many different triglycerides can be formed when one molecule of glycerol combines with one molecule of oleic acid, one molecule of palmitic acid, and one molecule of stearic acid?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
A)  1 
B)  2 
C)  3 
D)  4

Question 4

What is the effect of administering cortisol to a patient?

Accepted Answer

A)  The concentrations of both glucose and glycogen decrease. 
B)  The concentrations of both glucose and glycogen increase. 
C)  The concentration of glucose decreases, but the concentration of glycogen increases. 
D)  The concentration of glucose increases, but the concentration of glycogen decreases. 
A)  The concentrations of both glucose and glycogen decrease. 
B)  The concentrations of both glucose and glycogen increase. 
C)  The concentration of glucose decreases, but the concentration of glycogen increases. 
D)  The concentration of glucose increases, but the concentration of glycogen decreases.

Question 5

Which of the following factors will lead to increased cholesterol synthesis in the liver?

Accepted Answer

A)  high cholesterol levels inside cells 
B)  low cholesterol levels in the blood serum 
C)  a high ratio of HDL to LDL levels 
D)  all of these 
A)  high cholesterol levels inside cells 
B)  low cholesterol levels in the blood serum 
C)  a high ratio of HDL to LDL levels 
D)  all of these

Question 6

Which of the following diseases is associated with sphingomyelins?

Accepted Answer

A)  Alzheimer's disease 
B)  Parkinson's disease 
C)  multiple sclerosis 
D)  none of these 
A)  Alzheimer's disease 
B)  Parkinson's disease 
C)  multiple sclerosis 
D)  none of these

Question 7

How do uncharged, nonpolar molecules, such as O2 and N2, pass through cell membranes?

Accepted Answer

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

Question 8

How are polar molecules transported through a membrane?

Accepted Answer

A)  by active transport 
B)  through specific channels 
C)  by both of these methods 
D)  by none of these methods 
A)  by active transport 
B)  through specific channels 
C)  by both of these methods 
D)  by none of these methods

Question 9

Identify the disease that is associated with the overaccumulation of galactocerebroside in the body.

Accepted Answer

A)  Gaucher's disease 
B)  Fabry's disease 
C)  Krabbe's leukodystrophy 
D)  Niemann-Pick disease 
A)  Gaucher's disease 
B)  Fabry's disease 
C)  Krabbe's leukodystrophy 
D)  Niemann-Pick disease

Question 10

Which of the following is a mineralocorticoid hormone?

Accepted Answer

A)  aldosterone 
B)  cortisol 
C)  cortisone 
D)  all of these 
A)  aldosterone 
B)  cortisol 
C)  cortisone 
D)  all of these

Question 11

What is the function of aspirin and other NSAIDs?

Accepted Answer

A)  to inhibit both COX-1 and COX-2 activity 
B)  to inhibit only COX-1 activity 
C)  to inhibit only COX-2 activity 
D)  none of these 
A)  to inhibit both COX-1 and COX-2 activity 
B)  to inhibit only COX-1 activity 
C)  to inhibit only COX-2 activity 
D)  none of these

Question 12

Which of the following medical conditions can be treated by administering aldosterone?

Accepted Answer

A)  high blood pressure 
B)  plaque deposition 
C)  high triglycerides 
D)  tissue swelling 
A)  high blood pressure 
B)  plaque deposition 
C)  high triglycerides 
D)  tissue swelling

Question 13

Which receptor protein on the surface of LDL specifically binds to cells?

Accepted Answer

A)  apoB-100 
B)  apoC-100 
C)  apoB-400 
D)  apoC-300 
A)  apoB-100 
B)  apoC-100 
C)  apoB-400 
D)  apoC-300

Question 14

Which of the following chemical reactions is involved in the synthesis of bile salts?

Accepted Answer

A)  hydrolysis 
B)  oxidation 
C)  reduction 
D)  all of these 
A)  hydrolysis 
B)  oxidation 
C)  reduction 
D)  all of these

Question 15

In cholesterol, to which of the following steroid rings is the hydroxyl group attached?

Accepted Answer

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

Question 16

How does the oral contraceptive, mifepristone, block the action of progesterone?

Accepted Answer

A)  by binding to the receptor sites of progesterone 
B)  by inhibiting the synthesis of progesterone 
C)  by converting the excess progesterone into cholesterol 
D)  by breaking down the progesterone molecules present in the body 
A)  by binding to the receptor sites of progesterone 
B)  by inhibiting the synthesis of progesterone 
C)  by converting the excess progesterone into cholesterol 
D)  by breaking down the progesterone molecules present in the body

Question 17

Which of the following linkages is found in cerebrosides?

Accepted Answer

A)  α-1-fructosidic 
B)  β-1-glycosidic 
C)  both of these 
D)  neither of these 
A)  α-1-fructosidic 
B)  β-1-glycosidic 
C)  both of these 
D)  neither of these

Question 18

Which of the following is choline?

Accepted Answer

A)  HOCH2CH2NH2 
B)    
C)  [HOCH2CH2N(CH3)3] + 
D)  none of these 
A)  HOCH2CH2NH2 
B)    
C)  [HOCH2CH2N(CH3)3] + 
D)  none of these

Question 19

Which of the following is a glycolipid?

Accepted Answer

A)  ceramides 
B)  cerebrosides 
C)  endorphins 
D)  enkephalins 
A)  ceramides 
B)  cerebrosides 
C)  endorphins 
D)  enkephalins

Question 20

Consider the following structure.   Which of the following is the correct classification of this compound?

Accepted Answer

A)  a trisaccharide 
B)  a prostaglandin 
C)  a triglyceride 
D)  a leukotriene 
A)  a trisaccharide 
B)  a prostaglandin 
C)  a triglyceride 
D)  a leukotriene

Exam 20: Lipids

To which class of complex lipids does myelin, the coating of nerve axons, belong?

Which of the following statements is true of fatty acids?

How many different triglycerides can be formed when one molecule of glycerol combines with one molecule of oleic acid, one molecule of palmitic acid, and one molecule of stearic acid?

What is the effect of administering cortisol to a patient?

Which of the following factors will lead to increased cholesterol synthesis in the liver?

Which of the following diseases is associated with sphingomyelins?

How do uncharged, nonpolar molecules, such as O2 and N2, pass through cell membranes?

How are polar molecules transported through a membrane?

Identify the disease that is associated with the overaccumulation of galactocerebroside in the body.

Which of the following is a mineralocorticoid hormone?

What is the function of aspirin and other NSAIDs?

Which of the following medical conditions can be treated by administering aldosterone?

Which receptor protein on the surface of LDL specifically binds to cells?

Which of the following chemical reactions is involved in the synthesis of bile salts?

In cholesterol, to which of the following steroid rings is the hydroxyl group attached?

How does the oral contraceptive, mifepristone, block the action of progesterone?

Which of the following linkages is found in cerebrosides?

Which of the following is choline?

Which of the following is a glycolipid?

Consider the following structure. Which of the following is the correct classification of this compound?

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

Filters

How do uncharged, nonpolar molecules, such as O₂ and N₂, pass through cell membranes?