Question 1

Chylomicrons contain a monolayer on the outside of the particle consisting of

Accepted Answer

A)  cerebrosides and phospholipids. 
B)  cerebrosides and sphingolipids. 
C)  phospholipids and cholesterol. 
D)  cholesterol and sphingolipids. 
A)  cerebrosides and phospholipids. 
B)  cerebrosides and sphingolipids. 
C)  phospholipids and cholesterol. 
D)  cholesterol and sphingolipids.

Question 2

Which missing enzyme results in Fabry disease?

Accepted Answer

A)  "phospholipase A2" 
B)  "sphingomyelinase" 
C)  "$\alpha$-galactosidase A" 
D)  "hexosaminidase A" 
A)  "phospholipase A2" 
B)  "sphingomyelinase" 
C)  "$\alpha$-galactosidase A" 
D)  "hexosaminidase A"

Question 3

Compare glycerophospholipids with sphingolipids.

Accepted Answer

Both glycerophospholipids and sphingolip

Question 4

Identify the lipase whose activity is regulated by protein G58.

Accepted Answer

A)  colipase 
B)  monoacylglycerol lipase 
C)  hormone-sensitive lipase 
D)  adipose triglyceride lipase 
A)  colipase 
B)  monoacylglycerol lipase 
C)  hormone-sensitive lipase 
D)  adipose triglyceride lipase

Question 5

Compared with the COX-2 enzyme, COX-1 has

Accepted Answer

A)  a larger active site. 
B)  a smaller active site. 
C)  a more elongated three-dimensional structure. 
D)  more $\beta$-barrels. 
A)  a larger active site. 
B)  a smaller active site. 
C)  a more elongated three-dimensional structure. 
D)  more $\beta$-barrels.

Question 6

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 7

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 8

Compare and contrast the site of synthesis and the physiological function of the following steroids: cortisol, aldosterone, and testosterone.

Accepted Answer

All three are synthesized in the adrenal

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

Identify the polyunsaturated fatty acid.

Accepted Answer

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

Question 11

Predict the fatty acid with the lowest melting point.

Accepted Answer

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

Question 12

The inner monolayer and outer monolayer of a plasma membrane have different lipid compositions. Describe the composition and explain the role of the uneven distribution of membrane lipids.

Accepted Answer

The outer monolayer contains phosphatidy

Question 13

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 14

Identify the $ \omega $-6 fatty acid.

Accepted Answer

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

Question 15

In comparison with glycerophospholipids and sphingolipids, cholesterol contains a

Accepted Answer

A)  fatty acid. 
B)  phosphate group. 
C)  glycerol moiety. 
D)  steroid ring. 
A)  fatty acid. 
B)  phosphate group. 
C)  glycerol moiety. 
D)  steroid ring.

Question 16

Identify the wax.

Accepted Answer

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

Question 17

Which is the step in glucagon signaling where adipose triglyceride lipase mediates a reaction?

Accepted Answer

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

Question 18

Partial hydrogenation can result in the formation of

Accepted Answer

A)  " $ \omega $-3 fatty acids." 
B)  " $ \omega $-6 fatty acids." 
C)  "cis double bonds." 
D)  "trans double bonds." 
A)  " $ \omega $-3 fatty acids." 
B)  " $ \omega $-6 fatty acids." 
C)  "cis double bonds." 
D)  "trans double bonds."

Question 19

One advantage of using hydrogenation in the food industry is

Accepted Answer

A)  decreased processing time. 
B)  reduction in heart disease. 
C)  increased shelf life. 
D)  decreased melting point. 
A)  decreased processing time. 
B)  reduction in heart disease. 
C)  increased shelf life. 
D)  decreased melting point.

Question 20

The inner layer of the plasma membrane of human erythrocytes contains mostly __________ lipids.

Accepted Answer

A)  phosphatidylserine 
B)  ganglioside 
C)  phosphatidylcholine 
D)  sphingomyelin 
A)  phosphatidylserine 
B)  ganglioside 
C)  phosphatidylcholine 
D)  sphingomyelin

Exam 15: Lipid Structure and Function

Chylomicrons contain a monolayer on the outside of the particle consisting of

Which missing enzyme results in Fabry disease?

Compare glycerophospholipids with sphingolipids.

Identify the lipase whose activity is regulated by protein G58.

Compared with the COX-2 enzyme, COX-1 has

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

Compare and contrast the site of synthesis and the physiological function of the following steroids: cortisol, aldosterone, and testosterone.

A wax is defined as

Identify the polyunsaturated fatty acid.

Predict the fatty acid with the lowest melting point.

The inner monolayer and outer monolayer of a plasma membrane have different lipid compositions. Describe the composition and explain the role of the uneven distribution of membrane lipids.

Inhibition of the COX-1 enzyme results in

Identify the ω \omega ω -6 fatty acid.

In comparison with glycerophospholipids and sphingolipids, cholesterol contains a

Identify the wax.

Which is the step in glucagon signaling where adipose triglyceride lipase mediates a reaction?

Partial hydrogenation can result in the formation of

One advantage of using hydrogenation in the food industry is

The inner layer of the plasma membrane of human erythrocytes contains mostly __________ lipids.

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

Identify the $\omega$ -6 fatty acid.