Question 1

Which of the following statements is true of innate immunity?

Accepted Answer

A)   It only includes physical barriers.
B)   It is highly pathogen specific.
C)   Both of these statements are true.
D)   Neither of these statements is true.E) None of the above
F) C) and D)

Question 2

Which type of biomolecules are antibodies made of?

Accepted Answer

A)   glycoproteins
B)   lipoproteins
C)   glycerophospholipids
D)   sphingolipidsE) None of the above
F) A) and B)

Question 3

What is the smallest unit of an antigen that is capable of binding with an antibody?

Accepted Answer

A)   MHC class I
B)   An epitope
C)   A paratope
D)   MHC class IIE) None of the above
F) A) and B)

Question 4

How do plasma cells respond to antigens in the blood?

Accepted Answer

A)   They directly attack the antigens.
B)   They secrete soluble antibodies in the blood.
C)   Both of these are responses of plasma cells.
D)   Neither of these is a response of plasma cells.E) None of the above
F) B) and D)

Question 5

Which of the following can be antigens?

Accepted Answer

A)   nucleic acids
B)   polysaccharides
C)   proteins
D)   all of theseE) A) and B)
F) B) and D)

Question 6

Which of the following cells target and perforate the surfaces of abnormal cells?

Accepted Answer

A)   B cells
B)   Macrophages
C)   NK cells
D)   T cellsE) C) and D)
F) B) and C)

Question 7

Which of the following molecules that are on the surface of HIV strongly bind to CD4 molecules?

Accepted Answer

A)   gp41
B)   p24 capsid
C)   gp120
D)   p17 matrixE) A) and B)
F) B) and C)

Question 8

Which of the following is true of antigens?

Accepted Answer

A)   They elicit an immune response.
B)   They have a molecular weight of less than 3000.
C)   They have a simple structure.
D)   They are polypeptide chains, which have only one amino acid.E) A) and B)
F) A) and C)

Question 9

Which of the following is not a side effect of glucocorticoids?

Accepted Answer

A)   Diabetes
B)   Osteoporosis
C)   Skin atrophy
D)   None, these are all side effects of glucocorticoids.E) None of the above
F) A) and B)

Question 10

Which of the following is not a lymphoid organ?

Accepted Answer

A)   the spleen
B)   the thymus
C)   the thyroid
D)   the tonsilsE) A) and B)
F) A) and C)

Question 11

Which of the following are the first cells in the blood that encounter an antigen?

Accepted Answer

A)   B cells
B)   Dendritic cells
C)   Macrophages
D)   T cellsE) A) and B)
F) A) and C)

Question 12

Which portion of a T-cell receptor binds to an antigen?

Accepted Answer

A)   the constant region
B)   the variable region
C)   neither the constant region nor the variable region
D)   both the constant region and the variable regionE) None of the above
F) A) and B)

Question 13

Identify a difference between T-cell receptors and other immunoglobulins.

Accepted Answer

A)   Unlike other immunoglobulins, T-cell receptors do not have constant and variable regions.
B)   Unlike other immunoglobulins, T-cell receptors respond to nucleic acid antigens.
C)   Unlike other immunoglobulins, T-cell receptors cannot undergo somatic mutations.
D)   Unlike other immunoglobulins, T-cell receptors are antigen specific.E) A) and B)
F) All of the above

Question 14

What does "CD" stand for in the name of the molecule CD3?

Accepted Answer

A)   cell destroyer
B)   cluster determinant
C)   cluster disperser
D)   compact dimerE) B) and C)
F) None of the above

Question 15

Which of the following cells release perforins to target abnormal cells?

Accepted Answer

A)   B cells
B)   Macrophages
C)   NK cells
D)   TH cellsE) None of the above
F) C) and D)

Question 16

How do NK cells and Tc cells kill invading foreign cells?

Accepted Answer

A)   by engulfing and devouring them
B)   by inhibiting protein synthesis in the foreign cells
C)   by digesting their nuclear material
D)   by punching holes in their membranesE) B) and C)
F) C) and D)

Question 17

Which of the following statements is true of the structure of immunoglobulins?

Accepted Answer

A)   Each immunoglobulin molecule is made of two polypeptide chains.
B)   Each immunoglobulin molecule is made of four different polypeptide chains.
C)   Each immunoglobulin molecule is made of four identical polypeptide chains.
D)   Each immunoglobulin molecule is made of two identical light chains and two identical heavy chains.E) B) and D)
F) All of the above

Question 18

In which part of a phagocyte are antigens destroyed?

Accepted Answer

A)   in the mitochondria
B)   in the cytoplasm
C)   in the lysosomes
D)   inside the nucleusE) None of the above
F) A) and B)

Question 19

Which class of immunoglobulins has the lowest concentration in the serum?

Accepted Answer

A)   IgA
B)   IgD
C)   IgE
D)   IgME) A) and B)
F) A) and C)

Question 20

Which of the following immune cells develop into plasma cells?

Accepted Answer

A)   B cells
B)   Helper T cells
C)   Macrophages
D)   Memory T cellsE) B) and C)
F) A) and B)

Exam 30: Immunochemistry

How do NK cells and Tc cells kill invading foreign cells?

Correct AnswerverifiedShow Answer

Which of the following statements is true of innate immunity?

Correct AnswerverifiedShow Answer

Which of the following are the first cells in the blood that encounter an antigen?

Correct AnswerverifiedShow Answer

Which of the following statements is true of the structure of immunoglobulins?

Correct AnswerverifiedShow Answer

Which portion of a T-cell receptor binds to an antigen?

Correct AnswerverifiedShow Answer

How do plasma cells respond to antigens in the blood?

Correct AnswerverifiedShow Answer

Which of the following molecules that are on the surface of HIV strongly bind to CD4 molecules?

Correct AnswerverifiedShow Answer

Identify a difference between T-cell receptors and other immunoglobulins.

Correct AnswerverifiedShow Answer

Which of the following is not a side effect of glucocorticoids?

Correct AnswerverifiedShow Answer

What is the smallest unit of an antigen that is capable of binding with an antibody?

Correct AnswerverifiedShow Answer

In which part of a phagocyte are antigens destroyed?

Correct AnswerverifiedShow Answer

Which of the following can be antigens?

Correct AnswerverifiedShow Answer

Which class of immunoglobulins has the lowest concentration in the serum?

Correct AnswerverifiedShow Answer

Which of the following cells target and perforate the surfaces of abnormal cells?

Correct AnswerverifiedShow Answer

Which of the following immune cells develop into plasma cells?

Correct AnswerverifiedShow Answer

What does "CD" stand for in the name of the molecule CD3?

Correct AnswerverifiedShow Answer

Which of the following is not a lymphoid organ?

Correct AnswerverifiedShow Answer

Which type of biomolecules are antibodies made of?

Correct AnswerverifiedShow Answer

Which of the following cells release perforins to target abnormal cells?

Correct AnswerverifiedShow Answer

Which of the following is true of antigens?

Correct AnswerverifiedShow Answer

How do NK cells and T_c cells kill invading foreign cells?

Correct Answer
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