Final answer:
Individuals with the AB blood type have red blood cell membranes with both N-acetylgalactosamine and galactose sugars at the end of the oligosaccharide chains.
Step-by-step explanation:
The carbohydrates on the red blood cell membranes of a person with the AB blood type would have N-acetylgalactosamine and galactose on the ends of the chains. This is because individuals with blood type A have antigen A composed of N-acetylgalactosamine, and those with blood type B have antigen B composed of galactose. Persons with type AB blood type possess both antigens on their erythrocytes. As a result, when considering the sugar at the end of the oligosaccharide chain on the erythrocytes of someone with AB blood type, the answer to the student's question would be (5) b and c: N-acetylgalactosamine and galactose.