View the animation below, then complete the quiz to test your knowledge of the concept.

1	Which of the following statements about flagellar structure is TRUE?
	A)	the hook anchors the flagellum in the cell membrane
	B)	the basal body is a short curved segment
	C)	the filament extends out of the cell
	D)	A and B
	E)	A, B and C
2	The bacterial flagellum moves
	A)	by rotation that is powered by ATP.
	B)	by rotation that is powered by the proton motive force.
	C)	in a wave-like fashion that is powered by ATP.
	D)	in a wave-like fashion that is powered by the proton motive force.
	E)	in a wave-like fashion that is powered by enzymes.
3	Which of the following is involved in gliding motility in bacteria?
	A)	specialized cell-surface proteins
	B)	slimy polysaccharides
	C)	flagella
	D)	A and B
	E)	A, B, and C
4	Gram positive bacteria have flagella with four basal body rings, while those of gram negative bacteria have only two.
	A)	True
	B)	False
5	A spirochete moves in a screw-like manner that is mediated by axial fibrils located in the cell’s periplasmic space.
	A)	True
	B)	False