MLT 106 UNIT 3 EXAM 2025 QUESTIONS
AND ANSWERS
Who first discovered the ABO system? - ANS karl Lendsteiner
At what age do you start producing antibodies naturally? - ANS 3-6 months
A persons serum contains? - ANS Antibodies
A persons antigen is on their - ANS Cells
Landsteiners rule states - ANS If the abo antigen is present on the cells, the corresponding
antibody will be absent in the serum.
Abo typing reagents are made mostly from? - ANS Monoclonal antibodies
Anti-A reagent is what color? - ANS Blue
Anti-B reagent is what color? - ANS Yellow
Forward grouping (Front type) is found how? - ANS By taking known antibodies and testing
for unknown antigens
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, Reverse grouping (back type) - ANS Taking known antigens and testing for unknown
antibodies
Patient has all the antibodies (A&B) - ANS Type O
Patient has B antibodies - ANS Type A
Patients has A antibodies - ANS Type B
Patient has NO antibodies - ANS Type AB
What is the most common blood type? - ANS Type O
What is the least common blood type? - ANS Type AB
What age does your body have max output of antibody production? - ANS 5-10 years old
Antibodies may be of maternal origin and able to cross the placenta. What antibody is this? -
ANS IgG
Abo antibodies are predominantly what? - ANS IgM
What Gene is considered an AMORPH gene due to no detectable antigen is produced in
response to it? - ANS Gene O
What Type is responsible for creating a chain that will attach sugars to the cell membrane? -
ANS Type 2
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AND ANSWERS
Who first discovered the ABO system? - ANS karl Lendsteiner
At what age do you start producing antibodies naturally? - ANS 3-6 months
A persons serum contains? - ANS Antibodies
A persons antigen is on their - ANS Cells
Landsteiners rule states - ANS If the abo antigen is present on the cells, the corresponding
antibody will be absent in the serum.
Abo typing reagents are made mostly from? - ANS Monoclonal antibodies
Anti-A reagent is what color? - ANS Blue
Anti-B reagent is what color? - ANS Yellow
Forward grouping (Front type) is found how? - ANS By taking known antibodies and testing
for unknown antigens
COPYRIGHT © 2025 THESTAR ALL RIGHTS RESERVED 1
, Reverse grouping (back type) - ANS Taking known antigens and testing for unknown
antibodies
Patient has all the antibodies (A&B) - ANS Type O
Patient has B antibodies - ANS Type A
Patients has A antibodies - ANS Type B
Patient has NO antibodies - ANS Type AB
What is the most common blood type? - ANS Type O
What is the least common blood type? - ANS Type AB
What age does your body have max output of antibody production? - ANS 5-10 years old
Antibodies may be of maternal origin and able to cross the placenta. What antibody is this? -
ANS IgG
Abo antibodies are predominantly what? - ANS IgM
What Gene is considered an AMORPH gene due to no detectable antigen is produced in
response to it? - ANS Gene O
What Type is responsible for creating a chain that will attach sugars to the cell membrane? -
ANS Type 2
COPYRIGHT © 2025 THESTAR ALL RIGHTS RESERVED 2
