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

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

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Bacteria Morphology
The cell wall of

gram-negative bacteria are thicker than gram-positive bacteria
gram-positive bacteria are thicker than gram-negative bacteria
both have same thickness but composition is different
none of these

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Bacteria Morphology
Flagella move the cell by

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

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