Question 1

Keratin is an important aspect of non-specific defense
because

Select one:

a. It is toxic to
pathogens

b. It creates a
physical barrier against pathogens

c. It destroys
pathogens

d. It physically
restricts pathogens to a specific region

e. None of the
choices are correct

Question 2

Which antimicrobial does not interfere with protein
synthesis?

Select one:

a. Aminoglycosides

b. Tetracyclines

c. Erythromycin

d. Trimethroprim

e. Chloramphenicol

Question 3

Which is mismatched?

Select one:

a. Fimbriae –
adherence to substrate

b. Capsules –
antiphagocytic factor

c. Coagulase –
dissolve fibrin clots

d. Leukocidins –
damage white blood cells

e. Hemolysins –
damage red blood cells

Question 4

The embryonic yolk sac, the liver and the bone marrow are
sites where

Select one:

a. Immune responses
to antigen occur

b. Stem cells give
rise to immature lymphocytes

c. Antigen is
filtered from the blood

d. Antigen is
filtered from tissue fluid

e. T lymphocytes
complete maturation

Question 5

Infections that go unnoticed because there are no symptoms
are called

Select one:

a. Syndromes

b. Malaise

c. Inflammation

d. Asymptomatic

e. Secondary
infection

Question 6

Which of the following is incorrect about blood cells?

Select one:

a. After birth
produced in red bone marrow sites

b. Develop from
undifferentiated stem cells

c. Include mast
cells

d. Include leukocytes
that are either granulocytes or agranulocytes

e. Include
erythrocytes that, when mature, lose their nuclei

Question 7

The dried residues of fine droplets from mucus or saliva
that harbor and transmit pathogen are

Select one:

a. Fomites

b. Aerosols

c. Mechanical vectors

d. Droplet
nuclei

e. Biological vectors

Question 8

Which of the following is not a primary target of milk
pasteurization?

Select one:

a. Salmonella

b. Campylobacter
jejuni

c. Lactobacilli

d. Listeria
monocytogenes

e. Brucella

Question 9

The process of using a cleansing technique to mechanically
remove and reduce microorganisms and debris to safe levels is

Select one:

a. Disinfection

b. Sterilization

c. Antisepsis

d. Sanitization

e. Degermation

Question 10

Transfusion of the wrong blood type can cause

Select one:

a. Recipient antibody
activating the complement cascade to attack the RBCs

b. Fever and anemia

c. Systemic shock and
kidney failure

d. Massive hemolysis
of the donor RBCs

e. All of the choices
are correct

Question 11

The molecular fragment on an antigen molecule that a
lymphocyte recognizes and responds to is called a/an

Select one:

a. Epitope

b. Hapten

c. Antigen binding
site

d. Variable region

e. None of the
choices are correct

Question 12

A person who has anti A and anti B serum antibodies will
have blood type

Select one:

a. A

b. B

c. AB

d. O

e. Rh

Question 13

Which test is used to diagnose polio?

Select one:

a. ELISA

b. Western blot

c. Widal test

d. Complement
fixation

e. VRDL

Question 14

The Western blot test is confirmatory for HIV because

Select one:

a. It is more
sensitive than the ELISA

b. It has fewer false
positives than the ELISA

c. It tests for more
HIV antibodies than ELISA

d. It is easier to
interpret than ELISA

e. All of the choices
are correct

Question 15

Precipitation tests involve all the following except

Select one:

a. They rely on
formation of visible clumps for detection

b. They include the
VDRL test for syphilis

c. They are often
performed in agar gels

d. They can be done
in a test tube by carefully adding antiserum over antigen solution

e. A cloudy or opaque
zone developing where antigen and antibody react

Question 16

_____ function in humoral immunity, while _____ function in
cell-mediated immunity.

Select one:

a. B cells, T
cells

b. T cells, B cells

c. Monocytes,
Basophils

d. Basophils, T cells

e. B cells,
neutrophils

Question 17

Drugs that act by mimicking the normal substrate of an
enzyme, thereby blocking its active site, are called

Select one:

a. Inhibitors

b. Blockers

c. Competitive
inhibitors

d. Non-competitive
inhibitors

e. None of the
choices are correct

Question 18

The potential for hemolytic disease of the newborn occurs
when

Select one:

a. Maternal Rh+ cells
enter an Rh- fetus

b. Fetal Rh+ cells
enter an Rh- mother

c. Maternal Rh- cells
enter an Rh+ fetus

d. Fetal Rh- cells
enter an Rh+ mother

e. Fetal Rh+ cells
enter an Rh+ mother

Question 19

Destruction of lymphocytes with self-specificity is called

Select one:

a. Immune
tolerance

b. Proliferation

c. Clonal selection

d. Differentiation

e. Hypersensitivity

Question 20

What drug is used in cases of penicillin and methicillin
resistance and also used to treat endocarditis?

Select one:

a. Penicillin G

b. Vancomycin

c. Tetracycline

d. Erythromycin

e. Isoniazid