Question 1

These two lipid vitamins are often found in membranes:

Accepted Answer

A)  A and D 
B)  A and E 
C)  D and E 
D)  E and K 
E)  None of these is the correct pair. 
A)  A and D 
B)  A and E 
C)  D and E 
D)  E and K 
E)  None of these is the correct pair.

Question 2

Which of the following alcohols is never found in phosphatides?

Accepted Answer

A)  Ethanolamine 
B)  Serine 
C)  Inositol 
D)  Sugars 
E)  All of these can be components of phosphatides. 
A)  Ethanolamine 
B)  Serine 
C)  Inositol 
D)  Sugars 
E)  All of these can be components of phosphatides.

Question 3

Cholesterol is particularly important as a component of animal membranes.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following groups is not present in lecithin?

Accepted Answer

A)  Choline 
B)  Fatty acids 
C)  Glycerol 
D)  Phosphate 
E)  All of these are components of lecithin. 
A)  Choline 
B)  Fatty acids 
C)  Glycerol 
D)  Phosphate 
E)  All of these are components of lecithin.

Question 5

Which of the following is not a product of saponification of a triglyceride?

Accepted Answer

A)  Long chain fatty alcohols. 
B)  The salt of the fatty acids. 
C)  Soaps. 
D)  Glycerol. 
E)  All of these are products of saponification. 
A)  Long chain fatty alcohols. 
B)  The salt of the fatty acids. 
C)  Soaps. 
D)  Glycerol. 
E)  All of these are products of saponification.

Question 6

Which of the following groups is not present in a cerebroside?

Accepted Answer

A)  Sphingosine 
B)  Fatty acid 
C)  Phosphate 
D)  Sugar 
E)  All of these can be components of cerebrosides. 
A)  Sphingosine 
B)  Fatty acid 
C)  Phosphate 
D)  Sugar 
E)  All of these can be components of cerebrosides.

Question 7

When a membrane reaches its transition temperature,integral membrane proteins dissociate from the bilayer.

Accepted Answer

A) True 
 B)False

Question 8

Fatty acids with multiple double bonds are usually conjugated.

Accepted Answer

A) True 
 B)False

Question 9

Exhibit 8A   Refer to Exhibit 8A.Which protein would likely be involved in a channel?

Accepted Answer

A)  1 
B)  2 
C)  3 
D)  4 
E)  You cannot tell from the diagram. 
A)  1 
B)  2 
C)  3 
D)  4 
E)  You cannot tell from the diagram.

Question 10

Vitamin E has all of the following properties,except:

Accepted Answer

A) It is an antioxidant. 
B) It can be made in the sunshine. 
C) It is essential for at least some mammal's fertility. 
D) It is often a component of membranes. 
E) All of these describe vitamin E. 
A) It is an antioxidant. 
B) It can be made in the sunshine. 
C) It is essential for at least some mammal's fertility. 
D) It is often a component of membranes. 
E) All of these describe vitamin E.

Question 11

How many hydroxyl groups does a molecule of glycerol have?

Accepted Answer

A)  none 
B)  1 
C)  2 
D)  3 
E)  4 
A)  none 
B)  1 
C)  2 
D)  3 
E)  4

Question 12

In the operation of the sodium-potassium pump

Accepted Answer

A)  conformational changes in membrane proteins are inhibited 
B)  the ions involved bind to the lipid portion of the membrane 
C)  a membrane protein is phosphorylated with ATP as the source of the phosphate group 
D)  a membrane protein is phosphorylated with ADP as the source of the phosphate group 
A)  conformational changes in membrane proteins are inhibited 
B)  the ions involved bind to the lipid portion of the membrane 
C)  a membrane protein is phosphorylated with ATP as the source of the phosphate group 
D)  a membrane protein is phosphorylated with ADP as the source of the phosphate group

Question 13

The vitamin classified as fat soluble rather than water soluble is

Accepted Answer

A)  vitamin A 
B)  vitamin B1 
C)  vitamin B6 
D)  vitamin C 
A)  vitamin A 
B)  vitamin B1 
C)  vitamin B6 
D)  vitamin C

Question 14

Which of the following statements is true?

Accepted Answer

A)  All triacylglycerols and all phosphoacylglycerols have the same fatty acids in them. 
B)  All triacylglycerols have the same fatty acids, but the fatty acids in phosphoacylglycerols vary. 
C)  The fatty acids in triacylglycerols vary, but all phosphoacylglycerols have the same fatty acids in them. 
D)  The fatty acids in both triacylglycerols and in phosphoacylglycerols vary. 
A)  All triacylglycerols and all phosphoacylglycerols have the same fatty acids in them. 
B)  All triacylglycerols have the same fatty acids, but the fatty acids in phosphoacylglycerols vary. 
C)  The fatty acids in triacylglycerols vary, but all phosphoacylglycerols have the same fatty acids in them. 
D)  The fatty acids in both triacylglycerols and in phosphoacylglycerols vary.

Question 15

Liposomes are

Accepted Answer

A)  artificial membrane-bounded structures used to deliver medications. 
B)  single-layered membranes. 
C)  mixed micelles involved in cholesterol transport among cells. 
D)  bilayers with the hydrophobic regions on the outside. 
A)  artificial membrane-bounded structures used to deliver medications. 
B)  single-layered membranes. 
C)  mixed micelles involved in cholesterol transport among cells. 
D)  bilayers with the hydrophobic regions on the outside.

Question 16

Which of the following molecules is not amphipathic?

Accepted Answer

A)  cholesterol 
B)  glucose 
C)  oleic acid 
D)  phosphatidylcholine 
A)  cholesterol 
B)  glucose 
C)  oleic acid 
D)  phosphatidylcholine

Question 17

Glycolipids are characterized by containing the following non-lipid component:

Accepted Answer

A)  Sugars 
B)  Glycerol 
C)  Phosphate 
D)  Sphingosine 
E)  More than one of these characterize glycolipids. 
A)  Sugars 
B)  Glycerol 
C)  Phosphate 
D)  Sphingosine 
E)  More than one of these characterize glycolipids.

Question 18

Phospholipids are particularly important in these structures:

Accepted Answer

A)  Membranes. 
B)  Lipoproteins. 
C)  The brain and nervous system. 
D)  Membranes, the brain and the nervous system. 
E)  All of these are correct. 
A)  Membranes. 
B)  Lipoproteins. 
C)  The brain and nervous system. 
D)  Membranes, the brain and the nervous system. 
E)  All of these are correct.

Question 19

Which of the following would not be enriched on the outer side of the lipid bilayer compared to the inner side?

Accepted Answer

A)  Phosphoacylglyerol 
B)  Ganglioside 
C)  Cerebroside 
D)  Sphingomyelin 
A)  Phosphoacylglyerol 
B)  Ganglioside 
C)  Cerebroside 
D)  Sphingomyelin

Question 20

Lipids differ from most other biomolecules because they are defined on the basis of solubility,rather than on their chemical structure.

Accepted Answer

A) True 
 B)False

Exam 8: Lipids and Proteins Are Associated in Biological Membranes

These two lipid vitamins are often found in membranes:

Which of the following alcohols is never found in phosphatides?

Cholesterol is particularly important as a component of animal membranes.

Which of the following groups is not present in lecithin?

Which of the following is not a product of saponification of a triglyceride?

Which of the following groups is not present in a cerebroside?

When a membrane reaches its transition temperature,integral membrane proteins dissociate from the bilayer.

Fatty acids with multiple double bonds are usually conjugated.

Exhibit 8A Refer to Exhibit 8A.Which protein would likely be involved in a channel?

Vitamin E has all of the following properties,except:

How many hydroxyl groups does a molecule of glycerol have?

In the operation of the sodium-potassium pump

The vitamin classified as fat soluble rather than water soluble is

Which of the following statements is true?

Liposomes are

Which of the following molecules is not amphipathic?

Glycolipids are characterized by containing the following non-lipid component:

Phospholipids are particularly important in these structures:

Which of the following would not be enriched on the outer side of the lipid bilayer compared to the inner side?

Lipids differ from most other biomolecules because they are defined on the basis of solubility,rather than on their chemical structure.

Biochemistry and the Organization of Cells

Water: The Solvent for Biochemical Reactions

Amino Acids and Peptides

The Three-Dimensional Structure of Proteins

Protein Purification and Characterization Techniques

The Behavior of Proteins: Enzymes

The Behavior of Proteins: Enzymes, Mechanisms, and Control

Nucleic Acids: How Structure Conveys Information

Biosynthesis of Nucleic Acids: Replication

Transcription of the Genetic Code: Biosynthesis of Rna

Protein Synthesis: Translation of the Genetic Message

Nucleic Acid Biotechnology Techniques

Viruses, Cancer, and Immunology

The Importance of Energy Changes and Electron Transfer in Metabolism

Carbohydrates

Glycolysis

Storage Mechanisms and Control in Carbohydrate Metabolism

The Citric Acid Cycle

Electron Transport and Oxidative Phosphorylation

Lipid Metabolism

Photosynthesis

The Metabolism of Nitrogen

Integration of Metabolism: Cellular Signaling

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