Question 1

Show the structure of sphingosine and indicate the relationship between sphingosine and ceramide.

Accepted Answer

The structure of sphingosine i...

Question 2

Which of the following is not a fat-soluble vitamin?

Accepted Answer

A)  A
B)  C
C)  D
D)  E
E)  KF) D) and E)
G) All of the above

Question 3

Draw the structure of phosphatidylcholine.Circle the part of the molecule that is polar and draw an arrow to the part that is nonpolar.

Accepted Answer

For this structure, see Fig. 10-9.  At n...

Question 4

What chemical features distinguish a cerebroside from a ganglioside?

Accepted Answer

A cerebroside has a single sug...

Question 5

Describe the dependence of the melting point of a fatty acid upon 
(a)chain length and 
(b)unsaturation; 
(c)explain these dependencies in molecular terms.

Accepted Answer

All other things being equal,
(a)the lo...

Question 6

Which of the following is not a consequence of partial hydrogenation of vegetable oils?

Accepted Answer

A)  Longer shelf life
B)  Lower melting temperature
C)  Reduction of some cis double bonds to single bonds
D)  Conversion of some cis double bonds to trans double bonds
E)  Increased risk of cardiovascular disease upon consumption by humansF) A) and B)
G) B) and E)

Question 7

The venom of some rattlesnakes contains phospholipase A2.
a)Explain why a snake bite causes rapid pain and inflammation.
b)Based on your biochemical understanding of the mechanism of the pain,suggest a possible treatment.
c)If too much phospholipase A2 enters the bloodstream,the significant accumulation of one of the products of the reaction acts as a powerful detergent,causing the lysis of red blood cells and potential death.What is this dangerous product and what makes it such a good detergent?

Accepted Answer

a)Phospholipase A2 cleaves the 2-positio...

Question 8

Show the basic structure of all glycerophospholipids.

Accepted Answer

All glycerophospholipids have two fatty ...

Question 9

Non-steroidal anti-inflammatory drugs (NSAIDS) like aspirin and ibuprofen act by blocking production of:

Accepted Answer

A)  biological waxes
B)  prostaglandins
C)  sphingolipids
D)  vitamin D
E)  none of the aboveF) D) and E)
G) A) and B)

Question 10

An example of a glycerophospholipid that is involved in cell signaling is:

Accepted Answer

A)  arachidonic acid.
B)  ceramide.
C)  phosphatidylinositol.
D)  testosterone.
E)  vitamin A (retinol) .F) A) and C)
G) A) and B)

Question 11

Show the structure of isoprene;explain what is meant by isoprenoid compounds and give an example.

Accepted Answer

The structure is shown on page...

Question 12

Fatty acids are a component of:

Accepted Answer

A)  carotenes.
B)  cerebrosides.
C)  sterols.
D)  vitamin D.
E)  vitamin K.F) A) and E)
G) B) and D)

Question 13

What chemical features distinguish a plasmalogen from a common glycerophospholipid?

Accepted Answer

(1)The long-chain acyl group attached to...

Question 14

Which of the following molecules or substances contain,or are derived from,fatty acids?

Accepted Answer

A)  Beeswax
B)  Prostaglandins
C)  Sphingolipids
D)  Triacylglycerols
E)  All of the above contain or are derived from fatty acids.F) A) and B)
G) B) and E)

Question 15

Which of the following techniques is not commonly used to analyze lipid composition?

Accepted Answer

A)  Selective extraction using apolar solvents
B)  Adsorption chromatography
C)  X-ray crystallography
D)  Hydrolysis using enzymes with specificity for certain linkages
E)  Mass spectroscopyF) B) and C)
G) B) and E)

Question 16

Which of the following statements about sterols is true?

Accepted Answer

A)  All sterols share a fused-ring structure with four rings.
B)  Sterols are found in the membranes of all living cells.
C)  Sterols are soluble in water,but less so in organic solvents such as chloroform.
D)  Cholesterol is the principal sterol in fungi.
E)  The principal sterol of animal cells is ergosterol.F) B) and E)
G) All of the above

Question 17

Describe three functions of triacylglycerols in mammals and one function in higher plants.

Accepted Answer

Triacylglycerols provide mammals with (1...

Question 18

Biological waxes are all:

Accepted Answer

A)  triesters of glycerol and palmitic acid.
B)  esters of single fatty acids with long-chain alcohols.
C)  triesters of glycerol and three long chain saturated fatty acids.
D)  sphingolipids.
E)  None of the aboveF) A) and D)
G) A) and C)

Question 19

Which of the following contains an ether-linked alkyl group?

Accepted Answer

A)  Cerebrosides
B)  Gangliosides
C)  Phosphatidyl serine
D)  Platelet-activating factor
E)  SphingomyelinF) All of the above
G) None of the above

Question 20

Circle the fatty acid in each pair that has the higher melting temperature.
(a)18:1 $\Delta$ 9 18:2 $\Delta$ 9,12
(b)18:0 18:1 $\Delta$ 9
(c)18:0 16:0

Accepted Answer

(a)18:1 ...

Exam 10: Lipids

Which of the following molecules or substances contain,or are derived from,fatty acids?

Correct Answer
verified

Which of the following statements about sterols is true?

Correct Answer
verified

Non-steroidal anti-inflammatory drugs (NSAIDS) like aspirin and ibuprofen act by blocking production of:

Correct Answer
verified

What chemical features distinguish a plasmalogen from a common glycerophospholipid?

Correct Answer
verified
(1)The long-chain acyl group attached to...
View Answer

Which of the following techniques is not commonly used to analyze lipid composition?

Correct Answer
verified

Biological waxes are all:

Correct Answer
verified

Describe three functions of triacylglycerols in mammals and one function in higher plants.

Correct Answer
verified
Triacylglycerols provide mammals with (1...
View Answer

Fatty acids are a component of:

Correct Answer
verified

Circle the fatty acid in each pair that has the higher melting temperature. (a)18:1 ^$\Delta$ ⁹ 18:2 ^$\Delta$ ^9,12 (b)18:0 18:1 ^$\Delta$ ⁹ (c)18:0 16:0

Correct Answer
verified
(a)18:1 ...
View Answer

An example of a glycerophospholipid that is involved in cell signaling is:

Correct Answer
verified

Show the basic structure of all glycerophospholipids.

Correct Answer
verified
All glycerophospholipids have two fatty ...
View Answer

Show the structure of isoprene;explain what is meant by isoprenoid compounds and give an example.

Correct Answer
verified
The structure is shown on page...
View Answer

Describe the dependence of the melting point of a fatty acid upon (a)chain length and (b)unsaturation; (c)explain these dependencies in molecular terms.

Correct Answer
verified
All other things being equal,
(a)the lo...
View Answer

What chemical features distinguish a cerebroside from a ganglioside?

Correct Answer
verified
A cerebroside has a single sug...
View Answer

Draw the structure of phosphatidylcholine.Circle the part of the molecule that is polar and draw an arrow to the part that is nonpolar.

Correct Answer
verified
For this structure, see Fig. 10-9. At n...
View Answer

Show the structure of sphingosine and indicate the relationship between sphingosine and ceramide.

Correct Answer
verified
The structure of sphingosine i...
View Answer

Which of the following is not a consequence of partial hydrogenation of vegetable oils?

Correct Answer
verified

Which of the following is not a fat-soluble vitamin?

Correct Answer
verified

Correct Answer
verified
a)Phospholipase A2 cleaves the 2-positio...
View Answer

Which of the following contains an ether-linked alkyl group?

Correct Answer
verified

Exam 10: Lipids

Which of the following molecules or substances contain,or are derived from,fatty acids?

Correct AnswerverifiedShow Answer

Which of the following statements about sterols is true?

Correct AnswerverifiedShow Answer

Non-steroidal anti-inflammatory drugs (NSAIDS) like aspirin and ibuprofen act by blocking production of:

Correct AnswerverifiedShow Answer

What chemical features distinguish a plasmalogen from a common glycerophospholipid?

Correct Answerverified(1)The long-chain acyl group attached to...View AnswerShow Answer

Which of the following techniques is not commonly used to analyze lipid composition?

Correct AnswerverifiedShow Answer

Biological waxes are all:

Correct AnswerverifiedShow Answer

Describe three functions of triacylglycerols in mammals and one function in higher plants.

Correct AnswerverifiedTriacylglycerols provide mammals with (1...View AnswerShow Answer

Fatty acids are a component of:

Correct AnswerverifiedShow Answer

Circle the fatty acid in each pair that has the higher melting temperature. (a)18:1 Δ\DeltaΔ 9 18:2 Δ\DeltaΔ 9,12 (b)18:0 18:1 Δ\DeltaΔ 9 (c)18:0 16:0

Correct Answerverified(a)18:1 ...View AnswerShow Answer

An example of a glycerophospholipid that is involved in cell signaling is:

Correct AnswerverifiedShow Answer

Show the basic structure of all glycerophospholipids.

Correct AnswerverifiedAll glycerophospholipids have two fatty ...View AnswerShow Answer

Show the structure of isoprene;explain what is meant by isoprenoid compounds and give an example.

Correct AnswerverifiedThe structure is shown on page...View AnswerShow Answer

Describe the dependence of the melting point of a fatty acid upon (a)chain length and (b)unsaturation; (c)explain these dependencies in molecular terms.

Correct AnswerverifiedAll other things being equal, (a)the lo...View AnswerShow Answer

What chemical features distinguish a cerebroside from a ganglioside?

Correct AnswerverifiedA cerebroside has a single sug...View AnswerShow Answer

Draw the structure of phosphatidylcholine.Circle the part of the molecule that is polar and draw an arrow to the part that is nonpolar.

Correct AnswerverifiedFor this structure, see Fig. 10-9. At n...View AnswerShow Answer

Show the structure of sphingosine and indicate the relationship between sphingosine and ceramide.

Correct AnswerverifiedThe structure of sphingosine i...View AnswerShow Answer

Which of the following is not a consequence of partial hydrogenation of vegetable oils?

Correct AnswerverifiedShow Answer

Which of the following is not a fat-soluble vitamin?

Correct AnswerverifiedShow Answer

Correct Answerverifieda)Phospholipase A2 cleaves the 2-positio...View AnswerShow Answer

Which of the following contains an ether-linked alkyl group?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
(1)The long-chain acyl group attached to...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Triacylglycerols provide mammals with (1...
View Answer

Correct Answer
verified

Circle the fatty acid in each pair that has the higher melting temperature. (a)18:1 ^$\Delta$ ⁹ 18:2 ^$\Delta$ ^9,12 (b)18:0 18:1 ^$\Delta$ ⁹ (c)18:0 16:0

Correct Answer
verified
(a)18:1 ...
View Answer

Correct Answer
verified

Correct Answer
verified
All glycerophospholipids have two fatty ...
View Answer

Correct Answer
verified
The structure is shown on page...
View Answer

Correct Answer
verified
All other things being equal,
(a)the lo...
View Answer

Correct Answer
verified
A cerebroside has a single sug...
View Answer

Correct Answer
verified
For this structure, see Fig. 10-9. At n...
View Answer

Correct Answer
verified
The structure of sphingosine i...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
a)Phospholipase A2 cleaves the 2-positio...
View Answer

Correct Answer
verified