BIOS 242 WEEK 3 QUIZ MCQS FULL
SOLUTION 2026 QUESTIONS WITH ANSWERS
GRADED A+
◉ MHC I proteins are found
A) on B cells only.
B) on all nucleated cells.
C) on dendritic cells only.
D) on macrophages only. Answer: B) on all nucleated cells.
◉ The secondary lymphoid organs consist of which of the following?
A) the spleen only
B) mucosal-associated lymphoid tissue (MALT) only
C) lymph nodes only
D) lymph nodes, MALT, and the spleen Answer: D) lymph nodes,
MALT, and the spleen
◉ Blood and lymph have the following in common EXCEPT
A) proteins.
B) nucleated cells.
,C) red blood cells.
D) None of these. Answer: C) red blood cells.
◉ The body's noninducible, preexisting ability to recognize and
destroy a variety of pathogens or their products is called
A) phagocytosis.
B) adaptive immunity.
C) cytotoxic response.
D) innate immunity. Answer: D) innate immunity.
◉ Another name for "programmed cell death" is
A) necrosis.
B) apoptosis.
C) cellular degradation.
D) perforation. Answer: B) apoptosis.
◉ The enhancement of phagocytosis due to deposition of antibody
on the surface of a pathogen or antigen is called
A) inflammation.
B) antibody class switching.
C) complementation.
D) opsonization. Answer: D) opsonization.
,◉ Adaptive immunity occurs when
A) the innate immune response is overly effective.
B) the innate immune response fails to eliminate pathogens in the
body and virulent infections persist after the initial innate defense
response.
C) a broad, rapid response is needed to a wide range of pathogens
from the body regardless of the specific type of pathogen.
D) death results from pathogen infection. Answer: B) the innate
immune response fails to eliminate pathogens in the body and
virulent infections persist after the initial innate defense response.
◉ Immunoglobulins are produced by B cells and are also known as
A) antibodies.
B) pathogens.
C) bacteria.
D) antigens. Answer: A) antibodies.
◉ Communication between cells of the immune system is
accomplished in many cases through
A) clonal deletion.
B) allelic exclusion.
C) cytokines.
, D) allelic exclusion, clonal deletion, and cytokines. Answer: C)
cytokines.
◉ The rapid increase in adaptive immunity after a second antigen
exposure is called
A) immune memory.
B) tolerance.
C) specificity.
D) immune memory, specificity, or tolerance. Answer: A) immune
memory.
◉ Which of the following is TRUE about cytokines?
A) They are carbohydrates.
B) They play an important role in immunity, but do not affect stem
cell growth.
C) They are proteins that play an important role in immunity and the
growth of stem cells.
D) They play a role in the growth of stem cells, but are not important
in immunity. Answer: C) They are proteins that play an important
role in immunity and the growth of stem cells.
◉ Intracellular pathogens sometimes produce ________ that can kill
phagocytes.
A) leukocidins
SOLUTION 2026 QUESTIONS WITH ANSWERS
GRADED A+
◉ MHC I proteins are found
A) on B cells only.
B) on all nucleated cells.
C) on dendritic cells only.
D) on macrophages only. Answer: B) on all nucleated cells.
◉ The secondary lymphoid organs consist of which of the following?
A) the spleen only
B) mucosal-associated lymphoid tissue (MALT) only
C) lymph nodes only
D) lymph nodes, MALT, and the spleen Answer: D) lymph nodes,
MALT, and the spleen
◉ Blood and lymph have the following in common EXCEPT
A) proteins.
B) nucleated cells.
,C) red blood cells.
D) None of these. Answer: C) red blood cells.
◉ The body's noninducible, preexisting ability to recognize and
destroy a variety of pathogens or their products is called
A) phagocytosis.
B) adaptive immunity.
C) cytotoxic response.
D) innate immunity. Answer: D) innate immunity.
◉ Another name for "programmed cell death" is
A) necrosis.
B) apoptosis.
C) cellular degradation.
D) perforation. Answer: B) apoptosis.
◉ The enhancement of phagocytosis due to deposition of antibody
on the surface of a pathogen or antigen is called
A) inflammation.
B) antibody class switching.
C) complementation.
D) opsonization. Answer: D) opsonization.
,◉ Adaptive immunity occurs when
A) the innate immune response is overly effective.
B) the innate immune response fails to eliminate pathogens in the
body and virulent infections persist after the initial innate defense
response.
C) a broad, rapid response is needed to a wide range of pathogens
from the body regardless of the specific type of pathogen.
D) death results from pathogen infection. Answer: B) the innate
immune response fails to eliminate pathogens in the body and
virulent infections persist after the initial innate defense response.
◉ Immunoglobulins are produced by B cells and are also known as
A) antibodies.
B) pathogens.
C) bacteria.
D) antigens. Answer: A) antibodies.
◉ Communication between cells of the immune system is
accomplished in many cases through
A) clonal deletion.
B) allelic exclusion.
C) cytokines.
, D) allelic exclusion, clonal deletion, and cytokines. Answer: C)
cytokines.
◉ The rapid increase in adaptive immunity after a second antigen
exposure is called
A) immune memory.
B) tolerance.
C) specificity.
D) immune memory, specificity, or tolerance. Answer: A) immune
memory.
◉ Which of the following is TRUE about cytokines?
A) They are carbohydrates.
B) They play an important role in immunity, but do not affect stem
cell growth.
C) They are proteins that play an important role in immunity and the
growth of stem cells.
D) They play a role in the growth of stem cells, but are not important
in immunity. Answer: C) They are proteins that play an important
role in immunity and the growth of stem cells.
◉ Intracellular pathogens sometimes produce ________ that can kill
phagocytes.
A) leukocidins
