A person's blood type is determined by the
A) size of the red blood cells.
B) shape of the red blood cells.
C) chemical character of the hemoglobin.
D) presence or absence of specific molecules on the plasma membrane.
E) number of specific molecules on the plasma membrane.

Question

Quizplus · Accepted Answer

A person's blood type is determined by the presence or absence of specific molecules on the plasma membrane of red blood cells. These molecules are called antigens, and they are recognized by the body's immune system. The most common blood group systems are the ABO system and the Rh system.

A Person's Blood Type Is Determined by the