alleryThe largest of the leucocytes, amoeboid in shape and able to engulf bacteria by phagocytosis, is which cell type?
AMonocyte
BBasophil
CLymphocyte
DThrombocyte
Answer & Solution
Correct answer: A. Monocyte
1. The clue is 'largest leucocyte' that is phagocytic and engulfs bacteria.
2. Basophils release chemicals in inflammation, not phagocytose, so option B is wrong.
3. Lymphocytes make antibodies and thrombocytes are platelets, ruling out options C and D.
4. The largest, bacteria-engulfing leucocyte is the monocyte, option A.
_Source: Samacheer Kalvi (TN SCERT) Class 10 Science, Unit 14 Transportation in Plants and Circulation in Animals "Monocytes", p.213_
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