McqMate
| Q. |
Christmas factor is involved in – |
| A. | Blood Coagulation |
| B. | Excretion |
| C. | Digestion |
| D. | Respiration |
| Answer» A. Blood Coagulation | |
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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 protein causes hemophilia B. It was discovered in 1952 after a young boy named Stephen Christmas was found to be lacking this exact factor, leading to haemophilia. |
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