Question

multiple choice question
structurally, archaella are best described as a type of ______.

○ pilus
○ flagellum
○ s - layer
○ vesicle

Explanation:

Archaella are the motility structures of archaea. Structurally and functionally, they are analogous to bacterial flagella (though they have different molecular compositions). A pilus is for conjugation/adhesion, S - layer is a cell wall component, and a vesicle is for transport/storage, so archaella are best described as a type of flagellum.

Answer:

B. flagellum