Bacteria Morphology
The cell wall of

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

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Bacteria Morphology
Gram positive cells have a

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

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