Question 1

Which of the following is true of the location of antigens in a cell?

Accepted Answer

A)  They may be found in the cytoplasm. 
B)  They may be adsorbed on the surface of a cell membrane. 
C)  They may be embedded in the cell membrane. 
D)  All of these statements are true. 
A)  They may be found in the cytoplasm. 
B)  They may be adsorbed on the surface of a cell membrane. 
C)  They may be embedded in the cell membrane. 
D)  All of these statements are true.

Question 2

Which of the following antigens are recognized by T-cell receptors?

Accepted Answer

A)  nucleic acid antigens 
B)  polysaccharide antigens 
C)  peptide antigens 
D)  all of these 
A)  nucleic acid antigens 
B)  polysaccharide antigens 
C)  peptide antigens 
D)  all of these

Question 3

Which of the following statements is true of the structure of a TcR complex in a T cell?

Accepted Answer

A)  It consists of four polypeptide chains. 
B)  It has two amino-terminal C domains and two carboxy-terminal V domains. 
C)  It has intrachain disulfide bonds to stabilize the extracellular domains. 
D)  It is anchored to the cell membrane by a hydrophilic transmembrane segment. 
A)  It consists of four polypeptide chains. 
B)  It has two amino-terminal C domains and two carboxy-terminal V domains. 
C)  It has intrachain disulfide bonds to stabilize the extracellular domains. 
D)  It is anchored to the cell membrane by a hydrophilic transmembrane segment.

Question 4

Identify the cell marker that suppresses the action of TH cells that react to self-antigens.

Accepted Answer

A)  IL-2 
B)  CD 25 
C)  CD 8 
D)  IL-4 
A)  IL-2 
B)  CD 25 
C)  CD 8 
D)  IL-4

Question 5

What happens to T cells that fail to recognize and interact with MHCs during maturation?

Accepted Answer

A)  They are left to circulate in the blood. 
B)  They are converted to other types of cells. 
C)  They are eliminated through a selection process. 
D)  They are stored in the liver as reserves. 
A)  They are left to circulate in the blood. 
B)  They are converted to other types of cells. 
C)  They are eliminated through a selection process. 
D)  They are stored in the liver as reserves.

Question 6

Which of the following cells have a mode of action similar to that of cytotoxic T cells?

Accepted Answer

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

Question 7

Identify a secondary signaling pathway that controls the proliferation of B cells.

Accepted Answer

A)  activation by tyrosine kinase 
B)  deactivation by phosphatase 
C)  both of these 
D)  neither of these 
A)  activation by tyrosine kinase 
B)  deactivation by phosphatase 
C)  both of these 
D)  neither of these

Question 8

Which of the following chemical interactions hold the chains of an immunoglobulin together?

Accepted Answer

A)  disulfide bridges 
B)  hydrogen bonds 
C)  hydrophobic interactions 
D)  ionic bonds 
A)  disulfide bridges 
B)  hydrogen bonds 
C)  hydrophobic interactions 
D)  ionic bonds

Question 9

Which of the following statements is true of antiviral drugs for HIV?

Accepted Answer

A)  They destroy the virus before it enters a host cell. 
B)  They inhibit the activity of reverse transcriptase. 
C)  Both of these statements are true. 
D)  Neither of these statements is true. 
A)  They destroy the virus before it enters a host cell. 
B)  They inhibit the activity of reverse transcriptase. 
C)  Both of these statements are true. 
D)  Neither of these statements is true.

Question 10

Which of the following is a macrolide drug?

Accepted Answer

A)  cortisol 
B)  cyclosporin A 
C)  interleukin-2 
D)  interferon 
A)  cortisol 
B)  cyclosporin A 
C)  interleukin-2 
D)  interferon

Question 11

What makes HIV a deadly and persistent virus?

Accepted Answer

A)  It destroys helper T cells. 
B)  It can go undetected for a long time. 
C)  Both of these characteristics make HIV a deadly and persistent virus. 
D)  Neither of these characteristics makes HIV a deadly and persistent virus. 
A)  It destroys helper T cells. 
B)  It can go undetected for a long time. 
C)  Both of these characteristics make HIV a deadly and persistent virus. 
D)  Neither of these characteristics makes HIV a deadly and persistent virus.

Question 12

Which of the following statements is true of antiviral drugs for HIV?

Accepted Answer

A)  They destroy the virus before it enters a host cell. 
B)  They inhibit the activity of proteases. 
C)  Both of these statements are true. 
D)  Neither of these statements is true. 
A)  They destroy the virus before it enters a host cell. 
B)  They inhibit the activity of proteases. 
C)  Both of these statements are true. 
D)  Neither of these statements is true.

Exam 30: Immunochemistry

Which of the following is true of the location of antigens in a cell?

Which of the following antigens are recognized by T-cell receptors?

Which of the following statements is true of the structure of a TcR complex in a T cell?

Identify the cell marker that suppresses the action of TH cells that react to self-antigens.

What happens to T cells that fail to recognize and interact with MHCs during maturation?

Which of the following cells have a mode of action similar to that of cytotoxic T cells?

Identify a secondary signaling pathway that controls the proliferation of B cells.

Which of the following chemical interactions hold the chains of an immunoglobulin together?

Which of the following statements is true of antiviral drugs for HIV?

Which of the following is a macrolide drug?

What makes HIV a deadly and persistent virus?

Which of the following statements is true of antiviral drugs for HIV?

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

Filters

Identify the cell marker that suppresses the action of T_H cells that react to self-antigens.