BIOL 204 LECTURE EXAM 2 2026 MOLECULAR
BIOLOGY AND CELL STRUCTURE ASSESSMENT
STUDY GUIDE COMPLETE QUESTIONS AND
ANSWERS
◉ B lymphocytes develop immunocompetence in the:
A. thymus
B. spleen
C. lymph nodes
D. bone marrow. Answer: D. bone marrow
◉ Which of the following antibodies would most likely be involved
with the immune response against a microorganism entering the
digestive or reproductive tract?
A. IgM
B. IgA
C. IgD
D. IgE Answer: B. IgA
◉ The antibody that becomes bound to mast cells and basophils and
causes the cells to release histamine and other chemicals is:
A. IgM
,B. IgE
C. IgA
D. IgD Answer: B. IgE
◉ Passive immunity differs from active immunity in that passive
immunity:
A. is not effective against a preexisting condition
B. involves the administration of preformed antibodies
C. causes long-term immunity
D. results in the production of antibodies Answer: B. involves the
administration of preformed antibodies
◉ Natural killer cells can lyse and kill cancer cells and virus-infected
body cells _____________ the immune system is activated.
A. before
B. after Answer: A. before
◉ Which statement below is characteristic of a secondary humoral
response?
A. it triggers fever
B. it results in less memory cell circulation
C. it occurs only in the spleen
D. it occurs much more rapidly than a primary response
,E. It results in less antibody secretion Answer: D. it occurs much
more rapidly than a primary response
◉ Which of the following cells is the most critical cell in immunity?
A. B cell
B. helper T cell
C. cytotoxic T cell
D. APC Answer: B. helper T cell
◉ Body defenses that respond to generalized tissue damage and
many common pathogens are referred to as:
A. nonspecific mechanisms
B. specific mechanisms
C. phagocytic
D. antipathogenic responses Answer: A. nonspecific mechanisms
◉ Which cell does NOT have a direct role in phagocytosis?
A. NK cells
B. eosinophil
C. neutrophils
D. macrophages Answer: A. NK cells
, ◉ The elimination of self-reactive thymocytes is called:
A. tolerance
B. clonal selection
C. positive selection
D. negative selection Answer: D. negative selection
◉ Virus infected cells secrete complement to "warn" other cells of
the presence of virus. True or false? Answer: False
◉ Which of the following is NOT important in the antiviral innate
immune response?
A. interferons
B. natural killer cells
C. macrophages
D. complement Answer: C. macrophages
◉ Which of the following cells predominate at the site of chronic
infections?
A. B cell
B. eosinophils
C. basophils
D. macrophages Answer: D. macrophages
BIOLOGY AND CELL STRUCTURE ASSESSMENT
STUDY GUIDE COMPLETE QUESTIONS AND
ANSWERS
◉ B lymphocytes develop immunocompetence in the:
A. thymus
B. spleen
C. lymph nodes
D. bone marrow. Answer: D. bone marrow
◉ Which of the following antibodies would most likely be involved
with the immune response against a microorganism entering the
digestive or reproductive tract?
A. IgM
B. IgA
C. IgD
D. IgE Answer: B. IgA
◉ The antibody that becomes bound to mast cells and basophils and
causes the cells to release histamine and other chemicals is:
A. IgM
,B. IgE
C. IgA
D. IgD Answer: B. IgE
◉ Passive immunity differs from active immunity in that passive
immunity:
A. is not effective against a preexisting condition
B. involves the administration of preformed antibodies
C. causes long-term immunity
D. results in the production of antibodies Answer: B. involves the
administration of preformed antibodies
◉ Natural killer cells can lyse and kill cancer cells and virus-infected
body cells _____________ the immune system is activated.
A. before
B. after Answer: A. before
◉ Which statement below is characteristic of a secondary humoral
response?
A. it triggers fever
B. it results in less memory cell circulation
C. it occurs only in the spleen
D. it occurs much more rapidly than a primary response
,E. It results in less antibody secretion Answer: D. it occurs much
more rapidly than a primary response
◉ Which of the following cells is the most critical cell in immunity?
A. B cell
B. helper T cell
C. cytotoxic T cell
D. APC Answer: B. helper T cell
◉ Body defenses that respond to generalized tissue damage and
many common pathogens are referred to as:
A. nonspecific mechanisms
B. specific mechanisms
C. phagocytic
D. antipathogenic responses Answer: A. nonspecific mechanisms
◉ Which cell does NOT have a direct role in phagocytosis?
A. NK cells
B. eosinophil
C. neutrophils
D. macrophages Answer: A. NK cells
, ◉ The elimination of self-reactive thymocytes is called:
A. tolerance
B. clonal selection
C. positive selection
D. negative selection Answer: D. negative selection
◉ Virus infected cells secrete complement to "warn" other cells of
the presence of virus. True or false? Answer: False
◉ Which of the following is NOT important in the antiviral innate
immune response?
A. interferons
B. natural killer cells
C. macrophages
D. complement Answer: C. macrophages
◉ Which of the following cells predominate at the site of chronic
infections?
A. B cell
B. eosinophils
C. basophils
D. macrophages Answer: D. macrophages
