Question

Which of the following constituents is/are NOT normally found in serum obtained from human blood?

• A. Platelets
• B. Albumin
• C. Glucose
• D. Fibrinogen

Hint:

- Plasma = Serum + Clotting factors (like fibrinogen).
- Serum = Plasma - Clotting factors.
- Platelets are cellular components, not present in serum.

Answer 1

The Correct Option is A, D

Step 1: Serum is the liquid part of blood that remains after clotting. It is plasma without clotting factors.
Step 2: Platelets are cellular fragments involved in clot formation, hence they are not present in serum.
Step 3: Fibrinogen is a clotting factor that gets consumed during clotting, hence it is absent in serum.
Step 4: Albumin (a plasma protein) and glucose remain present in serum.
Thus, the constituents not normally found in serum are Platelets and Fibrinogen.
\[ \boxed{\text{Correct options: (A) and (D)}} \]