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Exercise 44 Bacterial Locomotion
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View the animation below, then complete the quiz to test your knowledge of the concept.






1Which 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



2The 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.



3Which 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



4Gram positive bacteria have flagella with four basal body rings, while those of gram negative bacteria have only two.
A)True
B)False



5A spirochete moves in a screw-like manner that is mediated by axial fibrils located in the cell’s periplasmic space.
A)True
B)False







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