AP BIOLOGY

Detailed explanation-1: -Categorizing blood according to type helps prevent reactions when someone gets a blood transfusion. Red blood cells have markers on their surface that characterize the cell type. These markers (also called antigens) are proteins and sugars that our bodies use to identify the blood cells as belonging in us.

Detailed explanation-2: -Your blood type is based on whether or not certain proteins are on your red blood cells. These proteins are called antigens. Your blood type (or blood group) depends on what types your parents passed down to you. Blood is often grouped according to the ABO blood typing system.

Detailed explanation-3: -There are four major blood groups determined by the presence or absence of two antigens, A and B, on the surface of red blood cells.

Detailed explanation-4: -Blood group antigens are either sugars or proteins, and they are attached to various components in the red blood cell membrane. For example, the antigens of the ABO blood group are sugars. They are produced by a series of reactions in which enzymes catalyze the transfer of sugar units.

Detailed explanation-5: -Erythrocytes (red blood cells) have proteins on their surface that determine blood type. Specifically, blood type refers to the presence of two classes of antigens (A/B/O and Rh) on the surface of red blood cells.