Serum is the liquid remaining after blood has been allowed to clot. During clot formation, fibrinogen and several other clotting components are consumed or removed. Consequently, serum differs from plasma principally because it lacks fibrinogen and important clotting factors.
Serum differs from blood as it lacks:
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Question context
This question is part of 🧬 Biochemistry within the broader 🧬 Medical Science subject and appears in the SPSC – Sindh Public Service Commission preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.