Question 1

Which of the following statements is true of the CD coreceptors on T cells?

Accepted Answer

A)  They consist of three polypeptide chains. 
B)  They consist of both hydrophilic and hydrophobic segments. 
C)  They have intrachain disulfide bridges. 
D)  All of these statements are true. 
A)  They consist of three polypeptide chains. 
B)  They consist of both hydrophilic and hydrophobic segments. 
C)  They have intrachain disulfide bridges. 
D)  All of these statements are true. D

Question 2

Which of the following adhesion molecules binds strongly to HIV?

Accepted Answer

A)  CD3 
B)  CD4 
C)  CD8 
D)  All of these 
A)  CD3 
B)  CD4 
C)  CD8 
D)  All of these B

Question 3

Identify an antibody that binds to gp120 and prevents the propagation of HIV.

Accepted Answer

A)  b12 
B)  2G12 
C)  p7 
D)  p17 
A)  b12 
B)  2G12 
C)  p7 
D)  p17 A

Question 4

Which cells of the immune system are the first to attack invading viruses or bacteria?

Accepted Answer

A)  B cells 
B)  Dendritic cells 
C)  Macrophages 
D)  T cells 
A)  B cells 
B)  Dendritic cells 
C)  Macrophages 
D)  T cells

Question 5

Which of the following immune cells are the primary targets of HIV?

Accepted Answer

A)  B cells 
B)  Dendritic cells 
C)  Macrophages 
D)  T cells 
A)  B cells 
B)  Dendritic cells 
C)  Macrophages 
D)  T cells

Question 6

Which bonds in an antigen are broken by the enzyme GILT?

Accepted Answer

A)  glycoside bonds 
B)  amide bonds 
C)  disulfide bonds 
D)  anhydride bonds 
A)  glycoside bonds 
B)  amide bonds 
C)  disulfide bonds 
D)  anhydride bonds

Question 7

Which of the following statements is true of the constant and variable region of immunoglobulins?

Accepted Answer

A)  Only light chains of immunoglobulins have both constant and variable regions. 
B)  Both light and heavy chains of immunoglobulins have constant and variable regions. 
C)  Only heavy chains of immunoglobulins have both constant and variable regions. 
D)  Neither light nor heavy chains of immunoglobulins have constant and variable regions. 
A)  Only light chains of immunoglobulins have both constant and variable regions. 
B)  Both light and heavy chains of immunoglobulins have constant and variable regions. 
C)  Only heavy chains of immunoglobulins have both constant and variable regions. 
D)  Neither light nor heavy chains of immunoglobulins have constant and variable regions.

Question 8

Which of the following immunoglobulins has the highest molecular weight?

Accepted Answer

A)  IgA 
B)  IgD 
C)  IgE 
D)  IgM 
A)  IgA 
B)  IgD 
C)  IgE 
D)  IgM

Question 9

Which of the following statements is true of immunoglobulins?

Accepted Answer

A)  They are composed of only amino acids. 
B)  They are carbohydrate-containing protein molecules. 
C)  They are lipid-containing protein molecules. 
D)  They all have the same molecular weight. 
A)  They are composed of only amino acids. 
B)  They are carbohydrate-containing protein molecules. 
C)  They are lipid-containing protein molecules. 
D)  They all have the same molecular weight.

Question 10

Identify the structure that directly encloses the enzymes of HIV.

Accepted Answer

A)  the p17 matrix 
B)  the p24 capsid 
C)  the gp41 bilayer 
D)  the gp120 bilayer 
A)  the p17 matrix 
B)  the p24 capsid 
C)  the gp41 bilayer 
D)  the gp120 bilayer

Question 11

Which spike protein helps the influenza A virus to recognize its target cells?

Accepted Answer

A)  hemagglutinin 
B)  neuraminidase 
C)  perforin 
D)  integrase 
A)  hemagglutinin 
B)  neuraminidase 
C)  perforin 
D)  integrase

Question 12

What is the function of class I MHC molecules?

Accepted Answer

A)  They pick up exogenous "dead" antigens. 
B)  They seek out antigen molecules that have been synthesized inside a virus-infected cell. 
C)  Both of these are functions of class I MHC molecules. 
D)  Neither of these is a function of class I MHC molecules. 
A)  They pick up exogenous "dead" antigens. 
B)  They seek out antigen molecules that have been synthesized inside a virus-infected cell. 
C)  Both of these are functions of class I MHC molecules. 
D)  Neither of these is a function of class I MHC molecules.

Question 13

Which of the following cells are produced when B cells are exposed to antigens?

Accepted Answer

A)  Helper T cells 
B)  Memory T cells 
C)  NK cells 
D)  Plasma cells 
A)  Helper T cells 
B)  Memory T cells 
C)  NK cells 
D)  Plasma cells

Question 14

Which class of immunoglobulins is associated with allergic reactions?

Accepted Answer

A)  IgA 
B)  IgD 
C)  IgE 
D)  IgM 
A)  IgA 
B)  IgD 
C)  IgE 
D)  IgM

Question 15

Identify the chemical interactions that bind an antigen to the variable region of an antibody.

Accepted Answer

A)  London dispersion forces 
B)  Dipole-dipole interactions 
C)  Hydrogen bonds 
D)  All of these 
A)  London dispersion forces 
B)  Dipole-dipole interactions 
C)  Hydrogen bonds 
D)  All of these

Question 16

Which of the following types of cells releases antibodies?

Accepted Answer

A)  Macrophages 
B)  Dendritic cells 
C)  B cells 
D)  T cells 
A)  Macrophages 
B)  Dendritic cells 
C)  B cells 
D)  T cells

Question 17

How are antibody-bound antigens destroyed in the blood?

Accepted Answer

A)  by phagocytosis 
B)  by the action of perforins 
C)  by the complement pathway 
D)  by the action of lysozymes 
A)  by phagocytosis 
B)  by the action of perforins 
C)  by the complement pathway 
D)  by the action of lysozymes

Question 18

Which of the following types of vaccine was originally used by Pasteur?

Accepted Answer

A)  an attenuated vaccine 
B)  an inactivated vaccine 
C)  a subunit vaccine 
D)  a mimic vaccine 
A)  an attenuated vaccine 
B)  an inactivated vaccine 
C)  a subunit vaccine 
D)  a mimic vaccine

Question 19

Which of the following T cells interact with antigens bound to MHC II molecules?

Accepted Answer

A)  helper T cells 
B)  killer T cells 
C)  both helper and killer T cells 
D)  neither helper T cells nor killer T cells 
A)  helper T cells 
B)  killer T cells 
C)  both helper and killer T cells 
D)  neither helper T cells nor killer T cells

Question 20

The given sketch depicts a virus in a weakened state. Which of the following sketches represents an inactivated vaccine?

Accepted Answer

A)    
B)    
C)    
D)  Any of these could represent an inactivated vaccine. 
A)    
B)    
C)    
D)  Any of these could represent an inactivated vaccine.

Exam 30: Immunochemistry

Which of the following statements is true of the CD coreceptors on T cells?

Which of the following adhesion molecules binds strongly to HIV?

Identify an antibody that binds to gp120 and prevents the propagation of HIV.

Which cells of the immune system are the first to attack invading viruses or bacteria?

Which of the following immune cells are the primary targets of HIV?

Which bonds in an antigen are broken by the enzyme GILT?

Which of the following statements is true of the constant and variable region of immunoglobulins?

Which of the following immunoglobulins has the highest molecular weight?

Which of the following statements is true of immunoglobulins?

Identify the structure that directly encloses the enzymes of HIV.

Which spike protein helps the influenza A virus to recognize its target cells?

What is the function of class I MHC molecules?

Which of the following cells are produced when B cells are exposed to antigens?

Which class of immunoglobulins is associated with allergic reactions?

Identify the chemical interactions that bind an antigen to the variable region of an antibody.

Which of the following types of cells releases antibodies?

How are antibody-bound antigens destroyed in the blood?

Which of the following types of vaccine was originally used by Pasteur?

Which of the following T cells interact with antigens bound to MHC II molecules?

The given sketch depicts a virus in a weakened state. Which of the following sketches represents an inactivated vaccine?

Matter, Energy, and Measurement

Atoms

Chemical Bonds

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes, Alkynes, and Aromatic Compounds

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Body Fluids

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