During the process of blood coagulation, vitamin-K helps in the
a) Formation of thromboplastin
b) Formation of prothrombin
c) Conversion of prothrombin to thrombin
d) Conversion of fibrinogen to fibrin
A
B
C
D
A.
(b) Vitamin-K (phylloquinone) is the anti-haemorrhagic vitamin or factor, reported and named by a Danish scientist, Dam as coagulation factor (Danish term), who got the Nobel Prize for it in 1943. It is necessary for the synthesis of prothrombin (the precursor of thrombin) in the liver for normal clotting of blood. Thus, vitamin-K helps in blood clotting, prevention of haemorrhage and excessive bleeding in wounds.
