Question 1

Lipid rafts are thought to be discrete membrane regions that contain high concentrations of

Accepted Answer

A)  phosphatidylinositol. 
B)  gangliosides. 
C)  phosphatidylcholine. 
D)  cholesterol. 
A)  phosphatidylinositol. 
B)  gangliosides. 
C)  phosphatidylcholine. 
D)  cholesterol.

Question 2

Explain how snake venom can lead to tissue damage and eventual death without treatment.

Accepted Answer

Snake venom often contains secreted phos

Question 3

Spices such as eugenol are added to oils to enhance the flavor because of

Accepted Answer

A)  hydrogen bonds. 
B)  dipole-dipole interactions. 
C)  hydrophilic interactions. 
D)  hydrophobic interactions. 
A)  hydrogen bonds. 
B)  dipole-dipole interactions. 
C)  hydrophilic interactions. 
D)  hydrophobic interactions.

Question 4

Inhibition of the COX-1 enzyme results in

Accepted Answer

A)  reduced pain and fever. 
B)  reduced mucin secretion. 
C)  increased risk of heart disease. 
D)  increased platelet aggregation. 
A)  reduced pain and fever. 
B)  reduced mucin secretion. 
C)  increased risk of heart disease. 
D)  increased platelet aggregation.

Question 5

The addition of phosphocholine to ceramides generates

Accepted Answer

A)  glycerophospholipids. 
B)  gangliosides. 
C)  cerebrosides. 
D)  sphingomyelin. 
A)  glycerophospholipids. 
B)  gangliosides. 
C)  cerebrosides. 
D)  sphingomyelin.

Question 6

Compare and contrast the structure of a wax to that of a fatty acid.

Accepted Answer

Fatty acids contain a carboxylic acid he

Question 7

Which membrane lipids are derivatives of long chain amino alcohols synthesized from palmitate and serine?

Accepted Answer

A)  phosphatidylinositol 
B)  phosphatidylcholine 
C)  sphingosines 
D)  phosphatidylethanolamine 
A)  phosphatidylinositol 
B)  phosphatidylcholine 
C)  sphingosines 
D)  phosphatidylethanolamine

Question 8

Predict the structure of a fatty acid that is trans 16:1 (   9).

Accepted Answer

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

Question 9

A wax is defined as

Accepted Answer

A)  long chain fatty alcohols esterified to hydrocarbon chains. 
B)  three fatty acids linked to a glycerol backbone. 
C)  a long hydrocarbon chain with a carboxylate group at the end. 
D)  two fatty acids and a phosphate group linked to a glycerol backbone. 
A)  long chain fatty alcohols esterified to hydrocarbon chains. 
B)  three fatty acids linked to a glycerol backbone. 
C)  a long hydrocarbon chain with a carboxylate group at the end. 
D)  two fatty acids and a phosphate group linked to a glycerol backbone.

Question 10

Which particles transport triacylglycerols to adipose tissue for storage?

Accepted Answer

A)  apolipoproteins 
B)  adipocytes 
C)  chylomicrons 
D)  perilipin 
A)  apolipoproteins 
B)  adipocytes 
C)  chylomicrons 
D)  perilipin

Question 11

Predict the fatty acid with the lowest melting point.

Accepted Answer

A)  trans 14:1 (  7) 
B)  cis 14:2 (  7,9) 
C)  trans 14:2 (  7,9) 
D)  cis 14:3 (  7,9,11) 
A)  trans 14:1 (  7) 
B)  cis 14:2 (  7,9) 
C)  trans 14:2 (  7,9) 
D)  cis 14:3 (  7,9,11)

Question 12

Define lipid rafts and explain their function.

Accepted Answer

Lipid rafts are assemblies of

Question 13

Identify the   -6 fatty acid.

Accepted Answer

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

Question 14

A television commercial states that high triacylglycerols in the bloodstream could be a result of diet.Two ways to transport triacylglycerols through the bloodstream are chylomicrons and VLDLs.Explain the statement from the commercial in terms of these two transportation systems.

Accepted Answer

Chylomicrons function to transport dieta

Question 15

Which is the step in glucagon signaling where adipose triglyceride lipase mediates a reaction?
1)A hydrolysis reaction cleaves a fatty acid from the stored triacylglycerols to generate diacylglycerol and a fatty acid.
2)Perilipin is phosphorylated on the surface of lipid droplets.
3)Albumin transports the free fatty acid.
4)A GDP-GTP exchange stimulates cyclic AMP production by the enzyme adenylate cyclase.

Accepted Answer

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

Question 16

Free fatty acids released from adipose tissue are transported throughout the body by a carrier protein called

Accepted Answer

A)  adipocyte. 
B)  albumin. 
C)  lipase. 
D)  colipase. 
A)  adipocyte. 
B)  albumin. 
C)  lipase. 
D)  colipase.

Question 17

Arrange the following steps of glucagon signaling in the correct order.
1)A hydrolysis reaction cleaves a fatty acid from the stored triacylglycerols to generate diacylglycerol and a fatty acid.
2)The regulatory protein G58 binds to adipose triglyceride lipase.
3)Perilipin is phosphorylated on the surface of lipid droplets.
4)Albumin transports the free fatty acid.
5)A GDP-GTP exchange stimulates cyclic AMP production by the enzyme adenylate cyclase.

Accepted Answer

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

Question 18

Compared with other areas of the membrane,lipid rafts contain more

Accepted Answer

A)  sphingolipids. 
B)  phosphatidylcholine. 
C)  phosphatidylinositol. 
D)  gangliosides. 
A)  sphingolipids. 
B)  phosphatidylcholine. 
C)  phosphatidylinositol. 
D)  gangliosides.

Question 19

One disadvantage of using partial hydrogenation in the food industry is that

Accepted Answer

A)  the shelf life of the oils is not as long. 
B)  trans fats are formed during the process. 
C)  the oils tend to become rancid and have foul odors. 
D)  the oils cost more than animal fats. 
A)  the shelf life of the oils is not as long. 
B)  trans fats are formed during the process. 
C)  the oils tend to become rancid and have foul odors. 
D)  the oils cost more than animal fats.

Question 20

Predict the fatty acid with the highest melting point.

Accepted Answer

A)  trans 14:1 (  7) 
B)  cis 14:2 (  7,9) 
C)  trans 14:2 (  7,9) 
D)  cis 14:3 (  7,9,11) 
A)  trans 14:1 (  7) 
B)  cis 14:2 (  7,9) 
C)  trans 14:2 (  7,9) 
D)  cis 14:3 (  7,9,11)

Exam 15: Lipid Structure and Function

Lipid rafts are thought to be discrete membrane regions that contain high concentrations of

Explain how snake venom can lead to tissue damage and eventual death without treatment.

Spices such as eugenol are added to oils to enhance the flavor because of

Inhibition of the COX-1 enzyme results in

The addition of phosphocholine to ceramides generates

Compare and contrast the structure of a wax to that of a fatty acid.

Which membrane lipids are derivatives of long chain amino alcohols synthesized from palmitate and serine?

Predict the structure of a fatty acid that is trans 16:1 ( 9).

A wax is defined as

Which particles transport triacylglycerols to adipose tissue for storage?

Predict the fatty acid with the lowest melting point.

Define lipid rafts and explain their function.

Identify the -6 fatty acid.

A television commercial states that high triacylglycerols in the bloodstream could be a result of diet.Two ways to transport triacylglycerols through the bloodstream are chylomicrons and VLDLs.Explain the statement from the commercial in terms of these two transportation systems.

Free fatty acids released from adipose tissue are transported throughout the body by a carrier protein called

Compared with other areas of the membrane,lipid rafts contain more

One disadvantage of using partial hydrogenation in the food industry is that

Predict the fatty acid with the highest melting point.

Principles of Biochemistry

Physical Biochemistry: Energy Conversion,water,and Membranes

Nucleic Acid Structure and Function

Protein Structure

Methods in Protein Biochemistry

Protein Function

Enzyme Mechanisms

Cell Signaling Systems

Glycolysis: a Paradigm of Metabolic Regulation

The Citrate Cycle

Oxidative Phosphorylation

Photosynthesis

Carbohydrate Structure and Function

Carbohydrate Metabolism

Lipid Metabolism

Amino Acid Metabolism

Nucleotide Metabolism

Metabolic Integration

Dna Replication, repair, and Recombination

Rna Synthesis, processing, and Gene Silencing

Protein Synthesis, posttranslational Modification, and Transport

Gene Regulation

Filters

Predict the structure of a fatty acid that is trans 16:1 ( ⁹).