SBB LATEST 2026 TEST PAPER QUESTIONS AND ANSWERS
GRADED A+
✔✔Why can anti-H sometimes be fund in A2B persons? - ✔✔The specific
immunodominant sugar blocks the presence of H antigen
✔✔Why is determenantion of Rh status crucial for obstetric patients? - ✔✔All Rh
negative mothers are possible candidates for Rhogam
✔✔An adult who inherits Le,Se and H will type as: - ✔✔Le(a-b+)
✔✔What immunodominant sugar is responsible for B specificity? - ✔✔D galactose
✔✔Red cells that phenotype as Le(a-b-) will convert to Le(a+b-) when incubated with
plasma from an adult containing? - ✔✔Le(a+) substance
✔✔What genotype does hh represent? - ✔✔Bombay
✔✔The Rh gene is located on chromosome? - ✔✔1
✔✔Why are Lewis antibodies no implicated in hemolytic disease of the newborn? -
✔✔Lewis antigens are poorly developed at birth
✔✔What substances will be present in the saliva of a person with the LeLe HH SeSe
AA genotype? - ✔✔A, H, Lea, Leb
✔✔How is Le(b) substance formed? - ✔✔L fucose is added to the subterminal N
acetylglucosamine of type 1H substance
✔✔A person with the Oh phenotype can only receive RBC from: - ✔✔Only Oh persons
✔✔What amino acid is specific for the S antigen? - ✔✔Methionine
✔✔Which of the following is true regarding the U antigen? - ✔✔Most U negative RBC
are also S-s-
✔✔Why is it imperative that homozygous cells be employed when ruling out Kidd
antibodies? - ✔✔Anti-Jka may appear compatible with heterozygous cells
✔✔Anti-I is associated with what infectious agent? - ✔✔Mycoplasma pneumonia
✔✔What Kidd antibody wil react with all panel cess, but not the autocontrol? - ✔✔Anti-
Jk3
, ✔✔All of the following are characterists of anti-Fya and anti-Fyb, EXCEPT:
1. can cause HDFN
2. Reacts best in AHG
3. enhanced with enzymes
4. IgG - ✔✔Enhanced with enzymes
✔✔This antibody typically causes RBC to exhibit a refractile shiny appearance and
mixed field reaction at AHG, and can be neutralized by most human urine? - ✔✔Anti-
Sda
✔✔What solution can denature Bennet-Goodspeed antigens? - ✔✔Cholorquine
diphosphate
✔✔Persons with the McLeod phenotype do not express this marker. - ✔✔Kx
✔✔DTT will destroy antigens from which blood group? - ✔✔Kell
✔✔Chronic granulomatous disease (CGD) is associated with what phenotype? -
✔✔McLeod
✔✔What P antigens are present in the p phenotype? - ✔✔none
✔✔What antigens are present in the P1 phenotype? - ✔✔P1, P, Pk
✔✔What phenotype can produce anti-PP1Pk? - ✔✔p
✔✔This antigen is found more on cord cells than on adult cells? - ✔✔i
✔✔Which antibody is associated with PCH? - ✔✔Anti-P
✔✔Which of the following is true regarding the Diego antigens? - ✔✔They are not
destroyed by Enzymes
✔✔Which of the following is false regarding anti-Wrb?
1. They are mostly IgG
2. Implicated in HTR
3. Mostly IgM
4. Implicated in HDN - ✔✔Mostly IgM
✔✔Which of the following is true regarding the Yt blood group system?
1. Antigens are destroyed by common enzymes
2. Not denatured by DTT
3. Antibodies are usually IgM
GRADED A+
✔✔Why can anti-H sometimes be fund in A2B persons? - ✔✔The specific
immunodominant sugar blocks the presence of H antigen
✔✔Why is determenantion of Rh status crucial for obstetric patients? - ✔✔All Rh
negative mothers are possible candidates for Rhogam
✔✔An adult who inherits Le,Se and H will type as: - ✔✔Le(a-b+)
✔✔What immunodominant sugar is responsible for B specificity? - ✔✔D galactose
✔✔Red cells that phenotype as Le(a-b-) will convert to Le(a+b-) when incubated with
plasma from an adult containing? - ✔✔Le(a+) substance
✔✔What genotype does hh represent? - ✔✔Bombay
✔✔The Rh gene is located on chromosome? - ✔✔1
✔✔Why are Lewis antibodies no implicated in hemolytic disease of the newborn? -
✔✔Lewis antigens are poorly developed at birth
✔✔What substances will be present in the saliva of a person with the LeLe HH SeSe
AA genotype? - ✔✔A, H, Lea, Leb
✔✔How is Le(b) substance formed? - ✔✔L fucose is added to the subterminal N
acetylglucosamine of type 1H substance
✔✔A person with the Oh phenotype can only receive RBC from: - ✔✔Only Oh persons
✔✔What amino acid is specific for the S antigen? - ✔✔Methionine
✔✔Which of the following is true regarding the U antigen? - ✔✔Most U negative RBC
are also S-s-
✔✔Why is it imperative that homozygous cells be employed when ruling out Kidd
antibodies? - ✔✔Anti-Jka may appear compatible with heterozygous cells
✔✔Anti-I is associated with what infectious agent? - ✔✔Mycoplasma pneumonia
✔✔What Kidd antibody wil react with all panel cess, but not the autocontrol? - ✔✔Anti-
Jk3
, ✔✔All of the following are characterists of anti-Fya and anti-Fyb, EXCEPT:
1. can cause HDFN
2. Reacts best in AHG
3. enhanced with enzymes
4. IgG - ✔✔Enhanced with enzymes
✔✔This antibody typically causes RBC to exhibit a refractile shiny appearance and
mixed field reaction at AHG, and can be neutralized by most human urine? - ✔✔Anti-
Sda
✔✔What solution can denature Bennet-Goodspeed antigens? - ✔✔Cholorquine
diphosphate
✔✔Persons with the McLeod phenotype do not express this marker. - ✔✔Kx
✔✔DTT will destroy antigens from which blood group? - ✔✔Kell
✔✔Chronic granulomatous disease (CGD) is associated with what phenotype? -
✔✔McLeod
✔✔What P antigens are present in the p phenotype? - ✔✔none
✔✔What antigens are present in the P1 phenotype? - ✔✔P1, P, Pk
✔✔What phenotype can produce anti-PP1Pk? - ✔✔p
✔✔This antigen is found more on cord cells than on adult cells? - ✔✔i
✔✔Which antibody is associated with PCH? - ✔✔Anti-P
✔✔Which of the following is true regarding the Diego antigens? - ✔✔They are not
destroyed by Enzymes
✔✔Which of the following is false regarding anti-Wrb?
1. They are mostly IgG
2. Implicated in HTR
3. Mostly IgM
4. Implicated in HDN - ✔✔Mostly IgM
✔✔Which of the following is true regarding the Yt blood group system?
1. Antigens are destroyed by common enzymes
2. Not denatured by DTT
3. Antibodies are usually IgM
