Question 1

Draw the structure of phosphatidylserine in the ionic form it would have at pH 7.

Accepted Answer

For this structure, see Fig. 1...

Question 2

What is the effect of a double bond on fatty acid structure?

Accepted Answer

Most double bonds in fatty aci...

Question 3

Which of the following is true of sphingolipids?

Accepted Answer

A)  Cerebrosides and gangliosides are sphingolipids.
B)  Phosphatidylcholine is a typical sphingolipid.
C)  They always contain glycerol and fatty acids.
D)  They contain two esterified fatty acids.
E)  They may be charged,but are never amphipathic.F) B) and D)
G) B) and E) A

Question 4

What is the most significant chemical difference between triacylglycerols and glycerophospholipids that leads to their different functions?

Accepted Answer

Triacylglycerols are nonpolar hydrophobi...

Question 5

Which of the following statements about membrane lipids is true?

Accepted Answer

A)  Glycerophospholipids are found only in the membranes of plant cells.
B)  Glycerophospholipids contain fatty acids linked to glycerol through amide bonds.
C)  Lecithin (phosphatidylcholine) ,which is used as an emulsifier in margarine and chocolate,is a sphingolipid.
D)  Some sphingolipids include oligosaccharides in their structure.
E)  Triacylglycerols are the principal components of erythrocyte membranes.F) B) and E)
G) A) and B)

Question 6

Which of the following is not true of sterols?

Accepted Answer

A)  Cholesterol is a sterol that is commonly found in mammals.
B)  Sterols are commonly found in bacterial membranes.
C)  Sterols are more common in plasma membranes than in intracellular membranes (mitochondria,lysosomes,etc. ) .
D)  Serols are precursors of steroid hormones.
E)  Sterols have a structure that includes four fused rings.F) A) and B)
G) B) and E)

Question 7

Describe the differences between the glycosphingolipids corresponding to the A,B,and O human blood group antigens.

Accepted Answer

The type O structure is found in all three glycosphingolipids.In both type A and type B,there is an added sugar;this sugar differs between type A and B.

Question 8

Which vitamin is derived from cholesterol?

Accepted Answer

A)  A
B)  B12 
C)  D
D)  E
E)  KF) B) and D)
G) B) and E)

Question 9

Identify the molecule(s) derived from sterols.

Accepted Answer

A)  Arachidonic acid
B)  Gangliosides
C)  Phosphatidylglycerol
D)  Prostaglandins
E)  CortisolF) B) and D)
G) All of the above

Question 10

Which of the following statements concerning fatty acids is correct?

Accepted Answer

A)  A fatty acid is the precursor of prostaglandins.
B)  Phosphatidic acid is a common fatty acid.
C)  Fatty acids all contain one or more double bonds.
D)  Fatty acids are a constituent of sterols.
E)  Fatty acids are strongly hydrophilic.F) C) and D)
G) A) and E)

Question 11

A compound containing N-acetylneuraminic acid (sialic acid) is:

Accepted Answer

A)  cardiolipin.
B)  ganglioside GM2.
C)  phosphatidylcholine.
D)  platelet-activating factor.
E)  sphingomyelin.F) A) and B)
G) A) and C)

Question 12

Which of the following best describes the cholesterol molecule?

Accepted Answer

A)  Amphipathic
B)  Nonpolar,charged
C)  Nonpolar,uncharged
D)  Polar,charged
E)  Polar,unchargedF) A) and E)
G) A) and B)

Question 13

Tay-Sachs disease is the result of a genetic defect in the metabolism of:

Accepted Answer

A)  gangliosides.
B)  phosphatidyl ethanolamine.
C)  sterols.
D)  triacylglycerols.
E)  vitamin D.F) A) and B)
G) C) and D)

Question 14

What are the chemical components of a biological wax,and what is their general structure?

Accepted Answer

A wax consists of a long-chain...

Question 15

If beeswax,cholesterol,and phosphatidylglycerol were dissolved in chloroform,then subjected to thin-layer chromatography on silica gel using a mixture of chloroform/methanol/water as the developing solvent,which would move fastest?

Accepted Answer

In this chromatography, the least polar ...

Question 16

Match between columns Premises: blood clotting Ca²+ and phosphate metabolism vision prevention of oxidative damage

Accepted Answer

The Answer of Vitamin D and Vitamin K and Vitamin is...

Question 17

Explain the cause of hereditary diseases of sphingolipid metabolism,such as Tay-Sachs and Niemann-Pick diseases.

Accepted Answer

These diseases are the result of mutatio...

Question 18

Which of the following answers is not true?

Accepted Answer

A)  Phospholipase A1 hydrolyzes the fatty acid from the 1-position on the glycerol backbone.
B)  Phospholipase B1 hydrolyzes the fatty acid from the 2-position on the glycerol backbone.
C)  Phospholipase C hydrolyzes the complete phospho-head group from the glycerol backbone.
D)  Phospholipase D hydrolyzes just the head group from the phospho-glycerol backbone.E) All of the above
F) B) and D)

Question 19

What do all these compounds have in common: vitamin A,vitamin K,ubiquinone,and dolichol?

Accepted Answer

They are all lipids with potent biological activities derived from isoprenoid precursors.

Question 20

Match between columns
                        Premises: important component of myelin membranes
mediates pain and inflammation
necessary for sight
intra-tissue messengers
blood clotting
reducing agent

Accepted Answer

The Answer of thromboxanes and vitamin A and sphingolipids and is...

Exam 10: Lipids

Draw the structure of phosphatidylserine in the ionic form it would have at pH 7.

Correct Answer
verified
For this structure, see Fig. 1...
View Answer

What is the effect of a double bond on fatty acid structure?

Correct Answer
verified
Most double bonds in fatty aci...
View Answer

Which of the following is true of sphingolipids?

Correct Answer
verified
A

What is the most significant chemical difference between triacylglycerols and glycerophospholipids that leads to their different functions?

Correct Answer
verified
Triacylglycerols are nonpolar hydrophobi...
View Answer

Which of the following statements about membrane lipids is true?

Correct Answer
verified

Which of the following is not true of sterols?

Correct Answer
verified

Describe the differences between the glycosphingolipids corresponding to the A,B,and O human blood group antigens.

Correct Answer
verified
The type O structure is found in all three glycosphingolipids.In both type A and type B,there is an added sugar;this sugar differs between type A and B.

Which vitamin is derived from cholesterol?

Correct Answer
verified

Identify the molecule(s) derived from sterols.

Correct Answer
verified

Which of the following statements concerning fatty acids is correct?

Correct Answer
verified

A compound containing N-acetylneuraminic acid (sialic acid) is:

Correct Answer
verified

Which of the following best describes the cholesterol molecule?

Correct Answer
verified

Tay-Sachs disease is the result of a genetic defect in the metabolism of:

Correct Answer
verified

What are the chemical components of a biological wax,and what is their general structure?

Correct Answer
verified
A wax consists of a long-chain...
View Answer

If beeswax,cholesterol,and phosphatidylglycerol were dissolved in chloroform,then subjected to thin-layer chromatography on silica gel using a mixture of chloroform/methanol/water as the developing solvent,which would move fastest?

Correct Answer
verified
In this chromatography, the least polar ...
View Answer

Match each of these vitamins with its biological role:

Explain the cause of hereditary diseases of sphingolipid metabolism,such as Tay-Sachs and Niemann-Pick diseases.

Correct Answer
verified
These diseases are the result of mutatio...
View Answer

Which of the following answers is not true?

Correct Answer
verified

What do all these compounds have in common: vitamin A,vitamin K,ubiquinone,and dolichol?

Correct Answer
verified
They are all lipids with potent biological activities derived from isoprenoid precursors.

Match the compounds on the left with the important roles they play listed on the right. (Answers are used only once.)

Exam 10: Lipids

Draw the structure of phosphatidylserine in the ionic form it would have at pH 7.

Correct AnswerverifiedFor this structure, see Fig. 1...View AnswerShow Answer

What is the effect of a double bond on fatty acid structure?

Correct AnswerverifiedMost double bonds in fatty aci...View AnswerShow Answer

Which of the following is true of sphingolipids?

Correct AnswerverifiedA

What is the most significant chemical difference between triacylglycerols and glycerophospholipids that leads to their different functions?

Correct AnswerverifiedTriacylglycerols are nonpolar hydrophobi...View AnswerShow Answer

Which of the following statements about membrane lipids is true?

Correct AnswerverifiedShow Answer

Which of the following is not true of sterols?

Correct AnswerverifiedShow Answer

Describe the differences between the glycosphingolipids corresponding to the A,B,and O human blood group antigens.

Correct AnswerverifiedThe type O structure is found in all three glycosphingolipids.In both type A and type B,there is an added sugar;this sugar differs between type A and B.

Which vitamin is derived from cholesterol?

Correct AnswerverifiedShow Answer

Identify the molecule(s) derived from sterols.

Correct AnswerverifiedShow Answer

Which of the following statements concerning fatty acids is correct?

Correct AnswerverifiedShow Answer

A compound containing N-acetylneuraminic acid (sialic acid) is:

Correct AnswerverifiedShow Answer

Which of the following best describes the cholesterol molecule?

Correct AnswerverifiedShow Answer

Tay-Sachs disease is the result of a genetic defect in the metabolism of:

Correct AnswerverifiedShow Answer

What are the chemical components of a biological wax,and what is their general structure?

Correct AnswerverifiedA wax consists of a long-chain...View AnswerShow Answer

If beeswax,cholesterol,and phosphatidylglycerol were dissolved in chloroform,then subjected to thin-layer chromatography on silica gel using a mixture of chloroform/methanol/water as the developing solvent,which would move fastest?

Correct AnswerverifiedIn this chromatography, the least polar ...View AnswerShow Answer

Match each of these vitamins with its biological role:

Explain the cause of hereditary diseases of sphingolipid metabolism,such as Tay-Sachs and Niemann-Pick diseases.

Correct AnswerverifiedThese diseases are the result of mutatio...View AnswerShow Answer

Which of the following answers is not true?

Correct AnswerverifiedShow Answer

What do all these compounds have in common: vitamin A,vitamin K,ubiquinone,and dolichol?

Correct AnswerverifiedThey are all lipids with potent biological activities derived from isoprenoid precursors.

Match the compounds on the left with the important roles they play listed on the right. (Answers are used only once.)

Correct Answer
verified
For this structure, see Fig. 1...
View Answer

Correct Answer
verified
Most double bonds in fatty aci...
View Answer

Correct Answer
verified
A

Correct Answer
verified
Triacylglycerols are nonpolar hydrophobi...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
The type O structure is found in all three glycosphingolipids.In both type A and type B,there is an added sugar;this sugar differs between type A and B.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
A wax consists of a long-chain...
View Answer

Correct Answer
verified
In this chromatography, the least polar ...
View Answer

Correct Answer
verified
These diseases are the result of mutatio...
View Answer

Correct Answer
verified

Correct Answer
verified
They are all lipids with potent biological activities derived from isoprenoid precursors.