Match List-I with List-II regarding the components of the blood coagulation cascade. List-I List-II A. Fibrinogen I. Enzyme complex that activates prothrombin B. Thrombin II. Soluble inactive protein in plasma C. Thrombokinase III. Essential mineral ion for clotting D. Calcium ions IV. Enzyme that converts inactive precursor into fibrin Choose the correct answer from the options given below:

Step-by-step solution

According to NCERT, fibrinogens are soluble inactive proteins present in the plasma (A-II). Thrombin is the active enzyme that converts inactive fibrinogen into fibrin threads (B-IV). Thrombokinase is an enzyme complex formed by a cascade of reactions, which is required to convert inactive prothrombin into active thrombin (C-I). Calcium ions play a very important role in the entire clotting cascade (D-III). Therefore, the correct matching is A-II, B-IV, C-I, D-III. Answer: A-II, B-IV, C-I, D-III