NDA General Ability Question (2025) — Solution

Step-by-step solution

Blood clotting or coagulation is a process that prevents excessive bleeding when a blood vessel is injured. Platelets and proteins in the plasma work together to stop the bleeding by forming a clot over the injury. Fibrinogen is a soluble plasma glycoprotein synthesized by the liver. During the blood coagulation cascade, the enzyme thrombin converts fibrinogen into insoluble fibrin threads, which form a mesh that traps red blood cells and platelets to form a stable blood clot. Pathogens are disease-causing microorganisms. Macrophages and phagocytes are types of white blood cells involved in the immune response and phagocytosis, not directly in the formation of the structural mesh of a blood clot. Answer: Fibrinogen