MLS PRACTICE COMP EXAM
QUESTIONS WITH VERIFIED
ANSWERS; 100% CORRECT; GRADE A
_____ molecules are usually not good antigenic substances.
A. Protein
B. Carbohydrate
C. Lipid
D. Glycoprotein - correct answer- C. Lipid
________ percent of the population secretes ABH substances in
body secretions
Select one:
a. 10
b. 20
c. 40
d. 80 - correct answer- d. 80
__________ are involved in cell-mediated immunity, whereas
______ are involved in humoral immunity.
A. T cells; B cells
,B. T cells; antibodies
C. B cells; T cells
D. Both A and B - correct answer- D. Both A and B
"Star activity" for a restriction enzyme refers to:
A. An ability to cleave DNA at sequences different from their
defined recognition sites
B. The enzyme's specificity for sites of methylation within the
nucleotide sequence
C. The temperature and pH conditions at which the enzyme will
function optimally
D. The percent increased accuracy of the enzyme when placed in
ideal conditions of pH - correct answer- A. An
ability to cleave DNA at sequences different from their defined
recognition sites
A "directed donor" unit of blood is defined as a unit of blood
from a person who gives blood for:
A. Relief of polycythemia or another blood disorder
B. His or her specific use only
C. A first-degree blood relative
,D. Another person he or she has specified - correct
answer- D. Another person he or she has specified
A "shift to the left" when used in describing a cell population
refers to:
Select one:
a. An increase in immature neutrophils
b. A decrease in reactive lymphocytes
c. An increase in platelets
d. An increase in erythrocytes - correct answer- a.
An increase in immature neutrophils
A 1-year-old boy is seen for having many recurrent infections
with Streptococcus pneumoniae. Laboratory tests revealed a
normal quantity of T cells, but no B cells and no
immunoglobulins were seen on electrophoresis. Which of the
following would most likely be the cause?
A. Chronic granulomatous disease
B. Bruton's agammaglobulinemia
C. DiGeorge's syndrome
D. Wiskott-Aldrich syndrome - correct answer- B.
Bruton's agammaglobulinemia
, A 2-week-old baby is seen for a possible infection with CMV.
Which of the following statements is false?
Select one:
a. A positive anti-CMV result from the baby's specimen is
inconclusive
b. An initial titer of anti-CMV IgG would need to be established
c. A positive result for anti-CMV IgM would indicate infection
d. All are false statements - correct answer- b. An
initial titer of anti-CMV would need to be established
A 22-year-old female with a cousin with AIDS who had taken
aspirin the day before and with needle marks on both arms
presents to donate whole blood. Based on this information,
would you accept, permanently defer (PD), or temporarily defer
(TD) the donor?
A. PD because of needle marks on both arms
B. TD because of needle marks on both arms
C. PD because of cousin with AIDS
D. TD because of aspirin - correct answer- A. PD
because of needle marks on both arms
QUESTIONS WITH VERIFIED
ANSWERS; 100% CORRECT; GRADE A
_____ molecules are usually not good antigenic substances.
A. Protein
B. Carbohydrate
C. Lipid
D. Glycoprotein - correct answer- C. Lipid
________ percent of the population secretes ABH substances in
body secretions
Select one:
a. 10
b. 20
c. 40
d. 80 - correct answer- d. 80
__________ are involved in cell-mediated immunity, whereas
______ are involved in humoral immunity.
A. T cells; B cells
,B. T cells; antibodies
C. B cells; T cells
D. Both A and B - correct answer- D. Both A and B
"Star activity" for a restriction enzyme refers to:
A. An ability to cleave DNA at sequences different from their
defined recognition sites
B. The enzyme's specificity for sites of methylation within the
nucleotide sequence
C. The temperature and pH conditions at which the enzyme will
function optimally
D. The percent increased accuracy of the enzyme when placed in
ideal conditions of pH - correct answer- A. An
ability to cleave DNA at sequences different from their defined
recognition sites
A "directed donor" unit of blood is defined as a unit of blood
from a person who gives blood for:
A. Relief of polycythemia or another blood disorder
B. His or her specific use only
C. A first-degree blood relative
,D. Another person he or she has specified - correct
answer- D. Another person he or she has specified
A "shift to the left" when used in describing a cell population
refers to:
Select one:
a. An increase in immature neutrophils
b. A decrease in reactive lymphocytes
c. An increase in platelets
d. An increase in erythrocytes - correct answer- a.
An increase in immature neutrophils
A 1-year-old boy is seen for having many recurrent infections
with Streptococcus pneumoniae. Laboratory tests revealed a
normal quantity of T cells, but no B cells and no
immunoglobulins were seen on electrophoresis. Which of the
following would most likely be the cause?
A. Chronic granulomatous disease
B. Bruton's agammaglobulinemia
C. DiGeorge's syndrome
D. Wiskott-Aldrich syndrome - correct answer- B.
Bruton's agammaglobulinemia
, A 2-week-old baby is seen for a possible infection with CMV.
Which of the following statements is false?
Select one:
a. A positive anti-CMV result from the baby's specimen is
inconclusive
b. An initial titer of anti-CMV IgG would need to be established
c. A positive result for anti-CMV IgM would indicate infection
d. All are false statements - correct answer- b. An
initial titer of anti-CMV would need to be established
A 22-year-old female with a cousin with AIDS who had taken
aspirin the day before and with needle marks on both arms
presents to donate whole blood. Based on this information,
would you accept, permanently defer (PD), or temporarily defer
(TD) the donor?
A. PD because of needle marks on both arms
B. TD because of needle marks on both arms
C. PD because of cousin with AIDS
D. TD because of aspirin - correct answer- A. PD
because of needle marks on both arms
