Description : Christmas factor is involved in – (1) Blood Coagulation (2) Excretion (3) Digestion (4) Respiration
Last Answer : (1) Blood Coagulation Explanation: Factor IX, also known as Christmas factor, is one of the serine proteases of the coagulation system; it belongs to peptidase family Sl. Deficiency of this ... young boy named Stephen Christmas was found to be lacking this exact factor, leading to haemophilia.