What is the difference between the blood types, A, B, and O?
A. For each blood type, A, B, and O, there is a different sugar attachment enzyme produced.
B. A and B individuals have carbohydrate trees on the surface of red blood cells. O individuals do not have carbohydrate trees.
C. The glycosyl transferase gene has a different mutation in A individuals than in B individuals. O individuals have no mutations in the glycosyl transferase gene.
D. Two of these answers are correct. The glycosyl transferase gene mutations in A and B individuals prevent the removal of carbohydrate trees from the cell surface. O individuals have no mutations and therefore have no carbohydrate trees on the red blood cell surface.
E. A and B individuals have different modifications made to their carbohydrate tree. O individuals have no modifications made to their carbohydrate tree.
Answer: E
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