Question 1

Which of the following is not found in cerebrosides?

Accepted Answer

A)  an amide linkage 
B)  a carbohydrate 
C)  a hydroxyl group 
D)  a phosphate group 
A)  an amide linkage 
B)  a carbohydrate 
C)  a hydroxyl group 
D)  a phosphate group

Question 2

Which of the following has the largest percentage of triglycerides?

Accepted Answer

A)  chylomicrons 
B)  HDL 
C)  LDL 
D)  VLDL 
A)  chylomicrons 
B)  HDL 
C)  LDL 
D)  VLDL

Question 3

Where in the body are leukotrienes most commonly found?

Accepted Answer

A)  blood plasma 
B)  the lungs 
C)  red blood cells 
D)  white blood cells 
A)  blood plasma 
B)  the lungs 
C)  red blood cells 
D)  white blood cells

Question 4

Which of the following type of reaction is involved in saponification?

Accepted Answer

A)  condensation 
B)  dehydration 
C)  hydrogenation 
D)  hydrolysis 
A)  condensation 
B)  dehydration 
C)  hydrogenation 
D)  hydrolysis

Question 5

Which of the following correctly describes membrane proteins?

Accepted Answer

A)  They are suspended on the surface of the membrane. 
B)  They are partly embedded in the bilayer. 
C)  They pass completely through the bilayer. 
D)  Any of the above, depending on the specific membrane protein. 
A)  They are suspended on the surface of the membrane. 
B)  They are partly embedded in the bilayer. 
C)  They pass completely through the bilayer. 
D)  Any of the above, depending on the specific membrane protein.

Question 6

How many rings are associated with the steroid structure?

Accepted Answer

A)  3 
B)  4 
C)  5 
D)  6 
A)  3 
B)  4 
C)  5 
D)  6

Question 7

Which of the following provide a mechanism for the transport of ions and polar molecules through a membrane?

Accepted Answer

A)  active transport 
B)  diffusion 
C)  both a and b 
D)  neither a nor b 
A)  active transport 
B)  diffusion 
C)  both a and b 
D)  neither a nor b

Question 8

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

Accepted Answer

A)  a carbonyl at carbon-9 
B)  a carboxylate at carbon-9 
C)  hydroxyl groups at carbon-9 and carbon-11 
D)  none of the above 
A)  a carbonyl at carbon-9 
B)  a carboxylate at carbon-9 
C)  hydroxyl groups at carbon-9 and carbon-11 
D)  none of the above

Question 9

Which of the following best describes the components of phospholipids?

Accepted Answer

A)  glycerol, one fatty acid, two phosphate groups, and an alcohol 
B)  glycerol, two fatty acids, a phosphate group, and an alcohol 
C)  either of these, depending on the identity of the phospholipid 
D)  none of the above 
A)  glycerol, one fatty acid, two phosphate groups, and an alcohol 
B)  glycerol, two fatty acids, a phosphate group, and an alcohol 
C)  either of these, depending on the identity of the phospholipid 
D)  none of the above

Question 10

Which of the following is involved in the conversion of testosterone to estradiol?

Accepted Answer

A)  Conversion of an alcohol to a ketone followed by loss of −H and of −CH3. 
B)  Conversion of a ketone to an alcohol followed by loss of −H and of −CH3. 
C)  Loss of −H and of −CH3 followed by conversion of an alcohol to a ketone. 
D)  Loss of −H and of −CH3 followed by conversion of a ketone to an alcohol. 
A)  Conversion of an alcohol to a ketone followed by loss of −H and of −CH3. 
B)  Conversion of a ketone to an alcohol followed by loss of −H and of −CH3. 
C)  Loss of −H and of −CH3 followed by conversion of an alcohol to a ketone. 
D)  Loss of −H and of −CH3 followed by conversion of a ketone to an alcohol.

Question 11

How many different triglycerides can be formed when glycerol combines with one molecule of oleic acid, one molecule of palmitic 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 12

Examine the following structure.  
-Examine the following structure.   Which of the following is the correct classification of this substance?

Accepted Answer

A)  complex lipid 
B)  phospholipid 
C)  glycerophospholipid 
D)  All of these are correct classifications. 
A)  complex lipid 
B)  phospholipid 
C)  glycerophospholipid 
D)  All of these are correct classifications.

Question 13

Which of the following are glycolipids?

Accepted Answer

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

Question 14

Which of the following is a mineralocorticoid hormone?

Accepted Answer

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

Question 15

What type of charge is carried by the biologically active portion of bile salts?

Accepted Answer

A)  negative 
B)  none 
C)  positive 
D)  It varies from one bile salt to another. 
A)  negative 
B)  none 
C)  positive 
D)  It varies from one bile salt to another.

Question 16

Drugs such as Vioxx and Celebrex do which of the following?

Accepted Answer

A)  cause formation of lipids which increase the risk of heart attacks 
B)  inhibit COX-2 activity 
C)  both a and b 
D)  neither a nor b 
A)  cause formation of lipids which increase the risk of heart attacks 
B)  inhibit COX-2 activity 
C)  both a and b 
D)  neither a nor b

Question 17

What is the function of a steroid hormone primary messenger?

Accepted Answer

A)  carry a message from one part of a cell to another part of the cell 
B)  deliver signals from one part of the body to another 
C)  either (a) or (b), depending on the specific hormone 
D)  neither (a) nor (b) 
A)  carry a message from one part of a cell to another part of the cell 
B)  deliver signals from one part of the body to another 
C)  either (a) or (b), depending on the specific hormone 
D)  neither (a) nor (b)

Question 18

Myelin, the coating of nerve axons, is which type of lipid?

Accepted Answer

A)  cephalin 
B)  lecithin 
C)  simple lipid 
D)  sphingolipid 
A)  cephalin 
B)  lecithin 
C)  simple lipid 
D)  sphingolipid

Question 19

Which of the following explains the insolubility of lipids in water?

Accepted Answer

A)  Lipids are polar molecules. 
B)  The polar portion of lipids is much larger than the nonpolar portion. 
C)  The polar portion of lipids is much smaller than the nonpolar portion. 
D)  The polar and nonpolar portions of lipids are of comparable size. 
A)  Lipids are polar molecules. 
B)  The polar portion of lipids is much larger than the nonpolar portion. 
C)  The polar portion of lipids is much smaller than the nonpolar portion. 
D)  The polar and nonpolar portions of lipids are of comparable size.

Question 20

Which of the following is a function of unsaturated fatty acids in membranes?

Accepted Answer

A)  They give the interior of the membrane liquid-like structure. 
B)  They provide a site for chemical reactions to occur. 
C)  both a and b 
D)  neither a nor b 
A)  They give the interior of the membrane liquid-like structure. 
B)  They provide a site for chemical reactions to occur. 
C)  both a and b 
D)  neither a nor b

Exam 21: Lipids

Which of the following is not found in cerebrosides?

Which of the following has the largest percentage of triglycerides?

Where in the body are leukotrienes most commonly found?

Which of the following type of reaction is involved in saponification?

Which of the following correctly describes membrane proteins?

How many rings are associated with the steroid structure?

Which of the following provide a mechanism for the transport of ions and polar molecules through a membrane?

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

Which of the following best describes the components of phospholipids?

Which of the following is involved in the conversion of testosterone to estradiol?

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

Examine the following structure. -Examine the following structure. Which of the following is the correct classification of this substance?

Which of the following are glycolipids?

Which of the following is a mineralocorticoid hormone?

What type of charge is carried by the biologically active portion of bile salts?

Drugs such as Vioxx and Celebrex do which of the following?

What is the function of a steroid hormone primary messenger?

Myelin, the coating of nerve axons, is which type of lipid?

Which of the following explains the insolubility of lipids in water?

Which of the following is a function of unsaturated fatty acids in membranes?

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