ABO ADVANCED FORMULAS FINAL PAPER 2026 FULL QUESTIONS AND ACCURATE SOLUTIONS STUDY GUIDE

ABO ADVANCED FORMULAS FINAL
PAPER 2026 FULL QUESTIONS AND
ACCURATE SOLUTIONS STUDY
GUIDE
◉ Chromosomes ____ and ____ are associated with the production of
Rh antigens.. Answer: #1 and 6


◉ True or false:


The presence or absence of A,B and H antigens are controlled by H and
ABO gene.. Answer: True


◉ ABH antigens on the RBC membrane are controlled by the _____
gene.. Answer: H


◉ ABH antigens on secretions (soluble) is indirectly controlled by the
_____ gene.. Answer: Se


◉ What does the H gene code for?. Answer: an enzyme transferase,
alpha-2-L fucosyltransferase, which codes for the L-fucose terminal
sugar.


◉ The H antigen precursor on on the RBC membrane is composed of
which four sugars?. Answer: - D- galactose x 2

, - L- fucose
- N-acetyl -D galactosamine


◉ What terminal sugar is added onto the H antigen precursor to form
the B antigen?. Answer: D- galactose


◉ Which terminal sugar is added onto the H antigen precursor to form
the A antigen?. Answer: N- acetyl-D galactosamine


◉ The blood type of a child is (AO, AB, BO, OO) can be predicted using a
concept known as _________ _________ .. Answer: Mendelian
inheritance


◉ ________ _________. Answer: is a lectin used to detect the presence
or absence of the A1 antigen.


A1 antigens have very little A1 antigen as most of the H antigens have
been converted.


◉ ____1.___ and ___2.____ cells react equally strong with reagent
Anti-A.


With 20% ___2.____ cells and 80% ___1.___ cells.. Answer: 1. A1 cells
2. A2 cells