Question

serum is plasma minus __________. a platelets b fibrinogen c prothrombin d fibrinogen and prothrombin

Explanation:

Serum is the liquid portion of blood after clotting. During clotting, fibrinogen (a soluble protein in plasma) is converted into insoluble fibrin threads. Prothrombin is also involved in the clotting process but is not the main component that differentiates plasma and serum. Platelets are cell - like fragments in blood and not related to the plasma - serum difference in terms of soluble proteins. So serum is plasma minus fibrinogen (as fibrinogen is consumed in clotting to form fibrin).

Answer:

B. fibrinogen