alleryWhich of the following bacterial surface structures is primarily involved in motility?
Aflagella
Bpili
Cfimbriae
Dglycocalyx
Answer & Solution
Correct answer: A. flagella
Bacterial flagella drive motility — the filament rotates from its basal body and propels the cell.
Pili are involved in DNA transfer (conjugation), fimbriae in attachment to surfaces, glycocalyx in protection.
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