Bacteria Morphology
Gram positive cells have a

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

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Bacteria Morphology
The cell wall of

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

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Bacteria Morphology
Flagella move the cell by

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

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