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
Braun lipoprotein
O-antigen of lipopolysaccharide (LPS)

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Bacteria Morphology
Gram positive cells have a

multiple layer of peptidoglycan that helps to retain the crystal violet stain
periplasmic space that traps the crystal violet
second outer membrane that helps to retain the crystal violet stain
thick capsule that traps the crystal violet stain

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