Question 1

Which of the following is true of all lecithins?

Accepted Answer

A)  Their fatty acids are all saturated. 
B)  Their fatty acids are all unsaturated. 
C)  There is always a phosphate group bound to carbon 1 of glycerol. 
D)  There is always an unsaturated fatty acid bound to carbon 1 of glycerol. 
A)  Their fatty acids are all saturated. 
B)  Their fatty acids are all unsaturated. 
C)  There is always a phosphate group bound to carbon 1 of glycerol. 
D)  There is always an unsaturated fatty acid bound to carbon 1 of glycerol.

Question 2

Examine the following structure.  
-Which number in the diagram represents an ester linkage?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  5 
A)  1 
B)  2 
C)  3 
D)  4 
E)  5

Question 3

Which of the following describes the distribution of the polar and nonpolar portions of lipids in the lipid bilayer?

Accepted Answer

A)  Both polar heads are on the inside of the bilayer and both hydrophobic tails are on the outside of the bilayer. 
B)  Both polar heads are on the outside of the bilayer and both hydrophobic tails are on the inside of the bilayer. 
C)  Both the inside and outside of the bilayer consist of alternating polar heads and nonpolar tails. 
D)  Some polar heads are on the inside of the bilayer and some are on the outside; the hydrophobic tails are similarly distributed. 
A)  Both polar heads are on the inside of the bilayer and both hydrophobic tails are on the outside of the bilayer. 
B)  Both polar heads are on the outside of the bilayer and both hydrophobic tails are on the inside of the bilayer. 
C)  Both the inside and outside of the bilayer consist of alternating polar heads and nonpolar tails. 
D)  Some polar heads are on the inside of the bilayer and some are on the outside; the hydrophobic tails are similarly distributed.

Question 4

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 5

Which of the following is true of most fatty acids found triglycerides?

Accepted Answer

A)  they are branched 
B)  they contain 10 to 20 carbon atoms 
C)  they contain an odd number of carbon atoms 
D)  none of the above 
A)  they are branched 
B)  they contain 10 to 20 carbon atoms 
C)  they contain an odd number of carbon atoms 
D)  none of the above

Question 6

Which of the following is found in all complex lipids?

Accepted Answer

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

Question 7

Which of the following are secondary messengers?

Accepted Answer

A)  prostaglandins 
B)  thromboxanes 
C)  both a and b 
D)  neither a nor b 
A)  prostaglandins 
B)  thromboxanes 
C)  both a and b 
D)  neither a nor b

Question 8

Which of the following carries cholesterol to the cells?

Accepted Answer

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

Question 9

Which of the following are glycerophospholipids?

Accepted Answer

A)  cephalins 
B)  lecithins 
C)  phosphatidylinositols 
D)  all of these 
A)  cephalins 
B)  lecithins 
C)  phosphatidylinositols 
D)  all of these

Question 10

Which of the following is found in cephalins?

Accepted Answer

A)  choline 
B)  inositol 
C)  serine 
D)  none of these 
A)  choline 
B)  inositol 
C)  serine 
D)  none of these

Question 11

Which of the following reactions is the source of trans fatty acids found in some processed foods?

Accepted Answer

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

Question 12

Which of the following can be treated by administering aldosterone?

Accepted Answer

A)  high blood pressure 
B)  high cholesterol 
C)  high triglycerides 
D)  tissue swelling 
A)  high blood pressure 
B)  high cholesterol 
C)  high triglycerides 
D)  tissue swelling

Question 13

Which of the following are glycolipids?

Accepted Answer

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

Question 14

Which of the following are primary messengers?

Accepted Answer

A)  prostaglandins 
B)  steroid hormones 
C)  thromboxanes 
D)  all of these 
A)  prostaglandins 
B)  steroid hormones 
C)  thromboxanes 
D)  all of these

Question 15

Which of the following is true of all glycerophospholipids?

Accepted Answer

A)  Their fatty acids are all saturated. 
B)  Their fatty acids are all unsaturated. 
C)  There is always a saturated fatty acid bound to carbon 2 of glycerol. 
D)  There is always an unsaturated fatty acid bound to carbon 2 of glycerol. 
A)  Their fatty acids are all saturated. 
B)  Their fatty acids are all unsaturated. 
C)  There is always a saturated fatty acid bound to carbon 2 of glycerol. 
D)  There is always an unsaturated fatty acid bound to carbon 2 of glycerol.

Question 16

Which of the following does not result in an increase in HDL?

Accepted Answer

A)  exercise 
B)  pregnancy 
C)  weight loss 
D)  None, they all result in an increase in HDL. 
A)  exercise 
B)  pregnancy 
C)  weight loss 
D)  None, they all result in an increase in HDL.

Question 17

Some glycerophospholipids are commonly called lecithins. Which of the following is found in all lecithins?

Accepted Answer

A)  choline 
B)  ethanolamine 
C)  inositol 
D)  serine 
A)  choline 
B)  ethanolamine 
C)  inositol 
D)  serine

Question 18

In which of the following ways do bile salts remove excess cholesterol?

Accepted Answer

A)  bile salts solubilize cholesterol 
B)  cholesterol is converted to bile salts which are then eliminated in the feces 
C)  both a and b 
D)  neither a nor b 
A)  bile salts solubilize cholesterol 
B)  cholesterol is converted to bile salts which are then eliminated in the feces 
C)  both a and b 
D)  neither a nor b

Question 19

Which class of glycerophospholipids can be phosphorylated to yield molecules which serve as signaling molecules?

Accepted Answer

A)  cephalins 
B)  lecithins 
C)  phosphatidylinositols 
D)  all of these 
A)  cephalins 
B)  lecithins 
C)  phosphatidylinositols 
D)  all of these

Question 20

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

Accepted Answer

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

Exam 21: Lipids

Which of the following is true of all lecithins?

Examine the following structure. -Which number in the diagram represents an ester linkage?

Which of the following describes the distribution of the polar and nonpolar portions of lipids in the lipid bilayer?

Which hormone triggers ovulation?

Which of the following is true of most fatty acids found triglycerides?

Which of the following is found in all complex lipids?

Which of the following are secondary messengers?

Which of the following carries cholesterol to the cells?

Which of the following are glycerophospholipids?

Which of the following is found in cephalins?

Which of the following reactions is the source of trans fatty acids found in some processed foods?

Which of the following can be treated by administering aldosterone?

Which of the following are glycolipids?

Which of the following are primary messengers?

Which of the following is true of all glycerophospholipids?

Which of the following does not result in an increase in HDL?

Some glycerophospholipids are commonly called lecithins. Which of the following is found in all lecithins?

In which of the following ways do bile salts remove excess cholesterol?

Which class of glycerophospholipids can be phosphorylated to yield molecules which serve as signaling molecules?

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

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