Immunohematology II-Weeks 1/2 Quiz

Immunohematology II

IgG immunoglobulins:

can cross the placenta from mother to fetus

Human blood groups were discovered around the year 1900 by:

K. Landsteiner

Ulex europaeus is:

a lectin with anti-H specificity

React best at body temperature (37 degrees Celsius), ability to cross the placental barrier, monomer structure...these are all good descriptor terms for which subclass of immunoglobulin?

IgG

A donor tested negative using commercial Anti-D reagent.  The weak D test was positive.  How should the unit be labeled?

D-positive

Which of the following is NOT true of ABO antibodies?

They are present at birth.

The alloantibodies produced by a patient upon exposure to a blood group antigen he/she lacks is an example of _________ immunity.

adaptive

Composed of proteins that cross the RBC membrane multiple times, not expressed on tissues or found in secretions...these statements describe ____ antigens.

Rh

A blood donor has the following genotype: hh, AB. 

What is his red blood cell phenotype?

O

Group A₂ constitutes approximately what percentage of group A individuals?

20%

On which type of person is weak D testing required?

blood donors

The greatest amount of H antigen is present on red cells of group:

O

Which statement regarding Rh antibodies is false?

They are naturally occurring.

ABO genes code for:

glycosyltransferases

A term used when two of the same alleles of a gene are inherited from each parent is:

homozygous

The enzyme responsible for adding H antigen to the red cell membrane is alpha-

L-fucosyl transferase