Bacteria Morphology
Which of the following is exposed on the outer surface of a gram-negative bacterium?

Electron transport system components
O-antigen of lipopolysaccharide (LPS)
Braun lipoprotein
Polysaccharide portion of lipoteichoic acid (LTA)

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Bacteria Morphology
Flagella move the cell by

attaching to nearby particles and contracting
many flagella beating in a synchronous, whip-like motion
an individual flagellum beating in a whip-like motion
spinning like a propeller

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