Question Detail

BIO 201 Objective Question
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Question

Why are individuals with blood type O considered universal donors for red blood cell transfusions?
Options
A Their red blood cells lack both A and B antigens, preventing recipient anti-A or anti-B antibodies from targeting them.
Correct Answer
B Their plasma naturally lacks anti-A and anti-B antibodies.
C They express both A and B antigens equally on their red blood cell surface.
D They possess dominant IA and IB alleles that suppress immune recognition in the recipient.
Correct Answer

Option A is the correct answer.

Detailed Explanation

Type O red blood cells express neither A nor B antigens (genotype IOIO), so recipient anti-A or anti-B antibodies will not bind or cause hemolytic reactions.

Hint

No hint available

Question Info

Course: BIO 201
Type: Objective
Difficulty: Not specified
Question 7 of 285
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