Question

People who have the o blood type possess ________. 1) an enzyme that adds an n-acetylgalactosamine to the end of the oligosaccharide chain on rbc membrane glycolipids 2) an enzyme that adds a galactose to the end of the oligosaccharide chain on rbc membrane glycolipids 3) an enzyme that adds phospholipids to the end of the oligosaccharide chain on rbc membrane glycolipids 4) no enzymes capable of attaching galactose or n-acetylgalactosamine to the end of the oligosaccharide chain on rbc membrane glycolipids

Answer 1

(4) People who have the O blood type possess no enzymes capable of attaching N-acetylgalactosamine or galactose on RBC membrane glycolipids at the end of the oligosaccharide chain. It’s the people with AB blood type who can possess enzyme with that capability.