Question 1

A patient is having problems regulating blood pressure and has poor kidney function.Which steroid could be responsible for this?

Accepted Answer

A)  progesterone 
B)  cortisol 
C)  aldosterone 
D)  estradiol 
A)  progesterone 
B)  cortisol 
C)  aldosterone 
D)  estradiol

Question 2

The total content of __________ is approximately the same in both the inner and outer layer of the plasma membrane of human erythrocytes.

Accepted Answer

A)  phosphatidylinositol 
B)  sphingomyelin 
C)  phosphatidylcholine 
D)  cholesterol 
A)  phosphatidylinositol 
B)  sphingomyelin 
C)  phosphatidylcholine 
D)  cholesterol

Question 3

Which of the following amino alcohols act as the functional group attached to a phosphate in a glycerophospholipid?

Accepted Answer

A)  methanolamine 
B)  ethanolamine 
C)  propanolamine 
D)  butanolamine 
A)  methanolamine 
B)  ethanolamine 
C)  propanolamine 
D)  butanolamine

Question 4

Snake venom often secretes phospholipase A2 enzymes,which cleave

Accepted Answer

A)  glycerophospholipids. 
B)  ceramides. 
C)  sphingosines. 
D)  gangliosides. 
A)  glycerophospholipids. 
B)  ceramides. 
C)  sphingosines. 
D)  gangliosides.

Question 5

Which step in glucagon signaling occurs in the Gs$\alpha$protein?
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) 1 
B) 2 
C) 3 
D) 5 
A) 1 
B) 2 
C) 3 
D) 5

Question 6

The lipase-mediated release of fatty acids can always be expected to occur when a person is

Accepted Answer

A)  hungry. 
B)  walking. 
C)  studying. 
D)  watching TV. 
A)  hungry. 
B)  walking. 
C)  studying. 
D)  watching TV.

Question 7

In comparison with glycerophospholipids,the structure of cerebrosides contains a

Accepted Answer

A)  fatty acid. 
B)  sphingosine. 
C)  choline. 
D)  steroid ring. 
A)  fatty acid. 
B)  sphingosine. 
C)  choline. 
D)  steroid ring.

Question 8

Which missing enzyme results in Fabry disease?

Accepted Answer

A)  phospholipase A2 
B)  sphingomyelinase 
C)    -galactosidase A 
D)  hexosaminidase A 
A)  phospholipase A2 
B)  sphingomyelinase 
C)    -galactosidase A 
D)  hexosaminidase A

Question 9

A fatty acid that has more than one double bond is referred to as

Accepted Answer

A)  monosaturated. 
B)  monounsaturated. 
C)  polysaturated. 
D)  polyunsaturated. 
A)  monosaturated. 
B)  monounsaturated. 
C)  polysaturated. 
D)  polyunsaturated.

Question 10

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

Accepted Answer

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

Question 11

Which of the following amino alcohols act as the functional group attached to a phosphate in a glycerophospholipid?

Accepted Answer

A)  lysine 
B)  serine 
C)  glycine 
D)  alanine 
A)  lysine 
B)  serine 
C)  glycine 
D)  alanine

Question 12

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 13

Describe the two ways triacylglycerols have been used to improve daily life.

Accepted Answer

Triacylglycerols improve daily life thro

Question 14

In comparison with gangliosides,the structure of phosphatidylcholine contains a

Accepted Answer

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

Question 15

Classify the following fatty acid.

Accepted Answer

A)  saturated 
B)  unsaturated 
C)  monounsaturated 
D)  polyunsaturated 
A)  saturated 
B)  unsaturated 
C)  monounsaturated 
D)  polyunsaturated

Question 16

Which eicosanoid regulates blood vessel constriction?

Accepted Answer

A)  prostaglandin 
B)  prostacyclin 
C)  thromboxane 
D)  leukotriene 
A)  prostaglandin 
B)  prostacyclin 
C)  thromboxane 
D)  leukotriene

Question 17

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 18

Compare the lipid signaling molecules derived from cholesterol to those derived from the   
-6 fatty acid arachidonate.

Accepted Answer

Cholesterol is the precursor to the ster

Question 19

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

Accepted Answer

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

Question 20

Using common nomenclature,name the following fatty acid.

Accepted Answer

A)  trans 16:2 (  11,13) 
B)  cis 16:2 (  11,13) 
C)  trans 16:2 (  3,5) 
D)  cis 16:2 (  3,5) 
A)  trans 16:2 (  11,13) 
B)  cis 16:2 (  11,13) 
C)  trans 16:2 (  3,5) 
D)  cis 16:2 (  3,5)

Exam 15: Lipid Structure and Function

A patient is having problems regulating blood pressure and has poor kidney function.Which steroid could be responsible for this?

The total content of __________ is approximately the same in both the inner and outer layer of the plasma membrane of human erythrocytes.

Which of the following amino alcohols act as the functional group attached to a phosphate in a glycerophospholipid?

Snake venom often secretes phospholipase A2 enzymes,which cleave

The lipase-mediated release of fatty acids can always be expected to occur when a person is

In comparison with glycerophospholipids,the structure of cerebrosides contains a

Which missing enzyme results in Fabry disease?

A fatty acid that has more than one double bond is referred to as

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

Which of the following amino alcohols act as the functional group attached to a phosphate in a glycerophospholipid?

One advantage of using hydrogenation in the food industry is

Describe the two ways triacylglycerols have been used to improve daily life.

In comparison with gangliosides,the structure of phosphatidylcholine contains a

Classify the following fatty acid.

Which eicosanoid regulates blood vessel constriction?

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.

Compare the lipid signaling molecules derived from cholesterol to those derived from the -6 fatty acid arachidonate.

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

Using common nomenclature,name the following fatty acid.

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

Snake venom often secretes phospholipase A₂ enzymes,which cleave

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