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NEET Biology question

BiologyBody Fluids and CirculationNEET

Read the following statements and identify incorrect ones (i) Blood serum has fibrinogen and other clotting factors, thus, it takes part in clotting (ii) Iron, protein, vitamin B12 and folic acid are essential for formation of haemoglobin (iii) Hematocrit value normally forms 45 percent of the blood volume (iv) Total number of leucocytes varies from 30,000-40,000 per cubic millimeter of blood in human (v) Oxalate hydrolyses fibrinogen to fibrin, thus acting as an anticoagulant

Answer: (B)

Solution

Serum is plasma with fibrinogen and clotting factors already removed, so it cannot take part in further clotting, making (i) false; the normal total leucocyte count is about 4,000-11,000/mm3, not 30,000-40,000, making (iv) false; and oxalates

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Question ID VK-116362