SEROLOGY EXAM 1 || WITH 100% ERROR-FREE
SOLUTIONS.
Which of the following antibodies is involved in allergic reactions (immediate hypersensitivity):
correct answers c.
IgE
What is the causative agent of Lyme disease? correct answers a spirochete
Which of the following antibodies are found in secretions? correct answers .
IgA
How many parts of diluent are there in a 2:5 dilution? correct answers a.
3
Cold hemagglutinin disease is characterized by a non-specific antibody active against all normal
red cells reacting best at which of the following temperatures? correct answers d.
4°C
Cytokines involved in the acquired immune response: correct answers are secreted by T-helper
cells.
Which of the following factors are not utilized in the alternate complement pathway? correct
answers d.
C1,C2,C4
Which of the following antigens are found on the T cell subset known as helper/inducer? correct
answers b.
CD4
Which of the following best describes an immunogen? correct answers d.
A substance that is capable of eliciting the formation of antibodies
MHC molecules are found on which of the following cells? correct answers MHC I molecules
are found on all nucleated cells;
MHC II molecules are only found on macrophages , dendritic cells , and B cells
Which of the following best describes a cytokine? correct answers b.
A chemical messenger that influences the activites of other cells.
The best antibody to detect infectious mononucleosis in the early state is: correct answers .
Anti-VCA IgM
, In the Hazards Identification System, four color-coded, diamond-shaped, symbols are arranged
to form a larger diamond shape. What type of hazard does the blue diamond positioned to the left
identify? correct answers c.
Health
The presence of normal flora acts as a defense mechanism by which of the following means?
correct answers d.
Competing with pathogens for nutrients
The classical complement pathway is dependent on which of the following? correct answers
antigen-antibody complex.
Which of the following is a major advantage of the ELISA vs the RIA procedure? correct
answers b.
enzyme labels are used instead of radioactive labels
Which is not a proper laboratory safety procedure? correct answers d.
wearing your laboratory coat at all times
Which of the following is a proteolytic enzyme that fragments IgG in three fragments? correct
answers enzyme papain
Which of the following is a competitive assay? correct answers labeled and unlabeled analytes
typically compete with each other for a limited number of binding sites on antibody molecules
Which of the following receptors is responsible for T-cell rosetting with sheep cells? correct
answers a.
CD2
Tube one contains 0.4 ml of serum and 1.6ml of saline. Tube two contains 1.2 ml of saline. What
volume must be transferred from tube one into tube two to achieve a 1:20 dilution of serum in
tube two? correct answers b.
0.4 ml
1 out of 1 points
Manufacturers are required to supply MSDSs for their products by: correct answers .
the Hazard Communication (HAZCOM) Standard
1 out of 1 points
A reactive or weakly reactive test result obtained with non-treponemal tests for syphilis
indicates the presence of: correct answers b.
Reagin
The time period referred to as the "core window" in hepatitis B infections is best described by
which of the following? correct answers b.
HBsAg has disappeared and anti-HBs has not been formed
SOLUTIONS.
Which of the following antibodies is involved in allergic reactions (immediate hypersensitivity):
correct answers c.
IgE
What is the causative agent of Lyme disease? correct answers a spirochete
Which of the following antibodies are found in secretions? correct answers .
IgA
How many parts of diluent are there in a 2:5 dilution? correct answers a.
3
Cold hemagglutinin disease is characterized by a non-specific antibody active against all normal
red cells reacting best at which of the following temperatures? correct answers d.
4°C
Cytokines involved in the acquired immune response: correct answers are secreted by T-helper
cells.
Which of the following factors are not utilized in the alternate complement pathway? correct
answers d.
C1,C2,C4
Which of the following antigens are found on the T cell subset known as helper/inducer? correct
answers b.
CD4
Which of the following best describes an immunogen? correct answers d.
A substance that is capable of eliciting the formation of antibodies
MHC molecules are found on which of the following cells? correct answers MHC I molecules
are found on all nucleated cells;
MHC II molecules are only found on macrophages , dendritic cells , and B cells
Which of the following best describes a cytokine? correct answers b.
A chemical messenger that influences the activites of other cells.
The best antibody to detect infectious mononucleosis in the early state is: correct answers .
Anti-VCA IgM
, In the Hazards Identification System, four color-coded, diamond-shaped, symbols are arranged
to form a larger diamond shape. What type of hazard does the blue diamond positioned to the left
identify? correct answers c.
Health
The presence of normal flora acts as a defense mechanism by which of the following means?
correct answers d.
Competing with pathogens for nutrients
The classical complement pathway is dependent on which of the following? correct answers
antigen-antibody complex.
Which of the following is a major advantage of the ELISA vs the RIA procedure? correct
answers b.
enzyme labels are used instead of radioactive labels
Which is not a proper laboratory safety procedure? correct answers d.
wearing your laboratory coat at all times
Which of the following is a proteolytic enzyme that fragments IgG in three fragments? correct
answers enzyme papain
Which of the following is a competitive assay? correct answers labeled and unlabeled analytes
typically compete with each other for a limited number of binding sites on antibody molecules
Which of the following receptors is responsible for T-cell rosetting with sheep cells? correct
answers a.
CD2
Tube one contains 0.4 ml of serum and 1.6ml of saline. Tube two contains 1.2 ml of saline. What
volume must be transferred from tube one into tube two to achieve a 1:20 dilution of serum in
tube two? correct answers b.
0.4 ml
1 out of 1 points
Manufacturers are required to supply MSDSs for their products by: correct answers .
the Hazard Communication (HAZCOM) Standard
1 out of 1 points
A reactive or weakly reactive test result obtained with non-treponemal tests for syphilis
indicates the presence of: correct answers b.
Reagin
The time period referred to as the "core window" in hepatitis B infections is best described by
which of the following? correct answers b.
HBsAg has disappeared and anti-HBs has not been formed
