Question 1

Which of the following groups is not present in a phosphatidic acid?

Accepted Answer

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

Question 2

Glycolipids on the surface of cells are especially important as cell markers.

Accepted Answer

A) True 
 B)False  True

Question 3

How do the membranes of plant and animal cells compare?

Accepted Answer

A)  Animal cell membranes tend to be more rigid than those of plant cells. 
B)  Animal cell membranes tend to be more fluid than those of plant cells. 
C)  Animal cell membranes tend to be more asymmetric than those of plant cells. 
D)  Animal cell membranes tend to be more symmetric than those of plant cells. 
A)  Animal cell membranes tend to be more rigid than those of plant cells. 
B)  Animal cell membranes tend to be more fluid than those of plant cells. 
C)  Animal cell membranes tend to be more asymmetric than those of plant cells. 
D)  Animal cell membranes tend to be more symmetric than those of plant cells. A

Question 4

Which of the following is not a characteristic of most fatty acids?

Accepted Answer

A)  Presence of trans double bonds. 
B)  Even number of carbon atoms. 
C)  Only one carboxyl (−COOH) group. 
D)  Absence of conjugated double bonds. 
E)  All of these characterize lipids. 
A)  Presence of trans double bonds. 
B)  Even number of carbon atoms. 
C)  Only one carboxyl (−COOH) group. 
D)  Absence of conjugated double bonds. 
E)  All of these characterize lipids.

Question 5

Glycolipids 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 6

Rickets is caused by a deficiency in

Accepted Answer

A)  vitamin A. 
B)  vitamin D. 
C)  vitamin E. 
D)  vitamin K. 
A)  vitamin A. 
B)  vitamin D. 
C)  vitamin E. 
D)  vitamin K.

Question 7

The HDL class of lipoprotein is generally believed to be preventative of heart disease.

Accepted Answer

A) True 
 B)False

Question 8

Which of the following groups is not present in sphingomyelin?

Accepted Answer

A)  Sphingosine 
B)  Fatty acid 
C)  Phosphate 
D)  Sugar 
A)  Sphingosine 
B)  Fatty acid 
C)  Phosphate 
D)  Sugar

Question 9

Cholesterol is particularly important as a component of animal membranes.

Accepted Answer

A) True 
 B)False

Question 10

Membrane lipids in a lipid bilayer are held together by

Accepted Answer

A)  hydrophobic interactions 
B)  hydrogen bonds 
C)  electrostatic forces 
D)  covalent bonds 
A)  hydrophobic interactions 
B)  hydrogen bonds 
C)  electrostatic forces 
D)  covalent bonds

Question 11

Passive transport is the same as:

Accepted Answer

A)  simple diffusion 
B)  facilitated diffusion 
C)  active transport 
D)  primary active transport 
A)  simple diffusion 
B)  facilitated diffusion 
C)  active transport 
D)  primary active transport

Question 12

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 13

In the sodium-potassium pump

Accepted Answer

A)  sodium is transported out of the cell and potassium into the cell, both against concentration gradients 
B)  sodium is transported into the cell and potassium out of the cell, both against concentration gradients 
C)  sodium is transported out of the cell and potassium into the cell, both in the same direction as concentration gradients 
D)  sodium and potassium are both transported out of the cell against concentration gradients 
A)  sodium is transported out of the cell and potassium into the cell, both against concentration gradients 
B)  sodium is transported into the cell and potassium out of the cell, both against concentration gradients 
C)  sodium is transported out of the cell and potassium into the cell, both in the same direction as concentration gradients 
D)  sodium and potassium are both transported out of the cell against concentration gradients

Question 14

Which of the following is not a function or characteristic of membrane proteins?

Accepted Answer

A)  Transport 
B)  Catalytic activity 
C)  Blood clotting 
D)  Receptor sites 
A)  Transport 
B)  Catalytic activity 
C)  Blood clotting 
D)  Receptor sites

Question 15

Exhibit 8A
  
-Refer to Exhibit 8A. Protein #2 would most likely function as a:

Accepted Answer

A)  Carrier 
B)  Channel 
C)  Cell identity 
D)  Receptor 
E)  You cannot tell from the diagram. 
A)  Carrier 
B)  Channel 
C)  Cell identity 
D)  Receptor 
E)  You cannot tell from the diagram.

Question 16

The following lipid vitamin is often used to preserve foods from spoiling:

Accepted Answer

A)  A 
B)  D 
C)  E 
D)  K 
E)  None of these preserves food. 
A)  A 
B)  D 
C)  E 
D)  K 
E)  None of these preserves food.

Question 17

What does amphipathic mean?

Accepted Answer

A)  having both positive and negative charges 
B)  having both acid and base properties 
C)  having both hydrophilic and hydrophobic regions 
D)  having two stereoisomers 
A)  having both positive and negative charges 
B)  having both acid and base properties 
C)  having both hydrophilic and hydrophobic regions 
D)  having two stereoisomers

Question 18

Membranes are generally symmetrical, i.e., the outer face is composed of the same number and types of phospholipids as the inner face.

Accepted Answer

A) True 
 B)False

Question 19

Aspirin produces most of its analgesic effects by

Accepted Answer

A)  binding to the plasma membrane of nerve cells 
B)  inhibiting the synthesis of vitamin A 
C)  inhibiting the synthesis of phospholipids 
D)  inhibiting the synthesis of prostaglandins 
A)  binding to the plasma membrane of nerve cells 
B)  inhibiting the synthesis of vitamin A 
C)  inhibiting the synthesis of phospholipids 
D)  inhibiting the synthesis of prostaglandins

Question 20

The difference between active transport and passive transport is that

Accepted Answer

A)  concentration gradients are involved in one and not in the other. 
B)  glycolipids play a role in one and not in the other. 
C)  one requires expenditure of energy by the cell and the other does not. 
D)  ions are transported into and out of the cell by one process and not by the other. 
A)  concentration gradients are involved in one and not in the other. 
B)  glycolipids play a role in one and not in the other. 
C)  one requires expenditure of energy by the cell and the other does not. 
D)  ions are transported into and out of the cell by one process and not by the other.

Exam 8: Lipids and Proteins Are Associated in Biological Membranes

Which of the following groups is not present in a phosphatidic acid?

Glycolipids on the surface of cells are especially important as cell markers.

How do the membranes of plant and animal cells compare?

Which of the following is not a characteristic of most fatty acids?

Glycolipids are particularly important in these structures:

Rickets is caused by a deficiency in

The HDL class of lipoprotein is generally believed to be preventative of heart disease.

Which of the following groups is not present in sphingomyelin?

Cholesterol is particularly important as a component of animal membranes.

Membrane lipids in a lipid bilayer are held together by

Passive transport is the same as:

Which of the following statements is true?

In the sodium-potassium pump

Which of the following is not a function or characteristic of membrane proteins?

Exhibit 8A -Refer to Exhibit 8A. Protein #2 would most likely function as a:

The following lipid vitamin is often used to preserve foods from spoiling:

What does amphipathic mean?

Membranes are generally symmetrical, i.e., the outer face is composed of the same number and types of phospholipids as the inner face.

Aspirin produces most of its analgesic effects by

The difference between active transport and passive transport is that

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

Filters