Blood groups MCQ - Practice Questions with Answers

In the ABO blood-group system, antigens are present on the surface of red blood cells. Blood group AB has both A and B antigens on its red blood cells, so it matches the condition in the question. Blood group A has only A antigen, while blood group B has only B antigen. Blood group O has neither A nor B antigen on the red blood cells. This antigen pattern is the basis for ABO compatibility in blood transfusion.

Karl Landsteiner identified the ABO blood group system in the early twentieth century, which made the scientific classification of human blood into different groups possible. That is why his name is attached to this discovery. Richard Lower is associated with early work on blood transfusion, not the classification of blood groups. Jean-Baptiste, as printed here, does not identify the scientist who classified blood groups. Edmund King is also not credited with this classification.

Karl Landsteiner identified the ABO blood group system, which made it possible to classify human blood into different groups and made blood transfusion much safer. Edward Jenner is known for the smallpox vaccine, not blood grouping. Louis Pasteur is associated with germ theory, pasteurisation and vaccines such as rabies. Robert Koch is remembered for identifying disease-causing bacteria and framing Koch's postulates. Therefore, the scientist linked specifically with classifying blood into groups is Karl Landsteiner.