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Ready-made multiple-choice practice quizzes, hand-checked. Take any free quiz online — every answer comes with an explanation, and every quiz page has a full answer key to revise from.
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Free · no sign-up · no time limit
Ready-made multiple-choice practice quizzes, hand-checked. Take any free quiz online — every answer comes with an explanation, and every quiz page has a full answer key to revise from.
Human body
Challenge your understanding of ABO groups, Rh factors, antigens, antibodies, and safe transfusion practices. Answer each question to see whether you got it right, with an explanation every time.
A free 10-question multiple-choice practice test on Human body. Each question has one correct answer and a short explanation, and the full answer key below the player doubles as a study sheet. No account, no time limit — take it as often as you like.
This is a free, 10-question multiple-choice quiz. Answer each question to see whether you got it right, with an explanation for every answer. There is no sign-up and no time limit — take it as many times as you like, and use the answer key above to revise before or after.
Correct answer: BO negative
O-negative red blood cells lack A, B, and Rh antigens, meaning recipient immune systems will not produce antibodies against them.
Correct answer: DAB positive
AB-positive individuals express A, B, and Rh antigens, meaning their plasma does not naturally contain antibodies against any of those surface markers.
Correct answer: BAnti-B antibodies
A person with type A blood produces anti-B antibodies to recognize and target foreign type B surface antigens.
Correct answer: DNeither A nor B antigens
Type O erythrocytes carry neither the A nor B carbohydrate antigen on their cell membranes, though they maintain the underlying H antigen precursor.
Correct answer: AD antigen (Rh system)
The Rhesus designation is based on the RhD antigen; individuals who have this protein are Rh-positive, while those lacking it are Rh-negative.
Correct answer: CAB positive
Because type AB plasma contains neither anti-A nor anti-B antibodies, it can be safely infused into recipients of any ABO group.
Correct answer: BHemolytic disease of the newborn
Maternal anti-Rh antibodies formed during a previous exposure can cross the placenta and destroy the red blood cells of an Rh-positive fetus.
Correct answer: AOnly type O
Type O is an autosomal recessive trait requiring two non-functional alleles, meaning two type O parents can pass on only O alleles to their offspring.
Correct answer: BAgglutination
Recipient antibodies bind to foreign antigens on donor erythrocytes, causing the cells to clump together (agglutinate) and lyse.
Correct answer: BChromosome 9
The ABO gene is mapped to the long arm of chromosome 9 (9q34.2), encoding glycosyltransferase enzymes that attach sugars to cell surfaces.