The Formation of a Soft Clot (Soluble Fibrin) in the Final

question 26

Multiple Choice

The formation of a soft clot (soluble fibrin) in the final stages of blood coagulation involves

• A) the aggregation of fibrinopeptides A and B by end-to-end and side-to-side polymerization.
• B) the action of thrombin on fibrin monomers in the presence of calcium ions.
• C) a transamidation reaction between the side chains of glutamine and lysine residues catalyzed by fibrinase and calcium ions to form covalent linkages between fibrin monomers.
• D) the proteolysis of fibrinogen to fibrin monomers catalyzed by fibrinase.
• E) the thrombin-catalyzed conversion of fibrinogen to fibrin and the non-enzymic aggregation of fibrin monomers.

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