Which of the following is the means by which a person\'s blood type is determine
ID: 3483974 • Letter: W
Question
Which of the following is the means by which a person's blood type is determined? A. the shape of the red blood cells. B. the number of specific molecules on the cell membrane. C. the chemical character of the hemoglobin. D. the presence or absence of specific glycoprotein molecules on their cell membrane E. the size of the red blood cells. Which of these terms is incorrectly matched with its definition? B. active immunity - an immune response started and developed by the cells C. acquired immunity - responses directed toward specific invaders D. actively acquired immunity - immunity passed via the placenta or milk to offspring E. Each of these is correctly described.Explanation / Answer
Blood type is determined by the presence of specific blood group antigens on the surface of RBC. Blood group antigens are glycoprotein antigens attached to the membrane surface of RBC. So, the correct option is option D, the presence or absence of specific glycoprotein molecules on their cell membrane. Immunity can be active or passive. An antibody produced in response to the antigen by the immune system is known as active immunity. Passive immunity on the other hand is a type of short-term immunity that results from the introduction of pre-formed antibodies. These pre-formed antibodies are produced in another person or in an animal. Immunity that is passed via the placenta or milk to offspring is an example of passive immunity. So, the correct option is option D, actively acquired immunity – immunity passed via the placenta or milk to offspring.
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