lipopolysaccharide

Bacterial flagella: types and structure

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Introduction Strains of bacteria which are motile possess filamentous, cytoplasmic appendages protruding through cell wall called flagella. This effect screw like propulsive movements and act as organs of locomotion. They are much thinner than the flagella or cilia of eukaryotes. The flagellum is a long, thin filament, hair-like, un-branched, twisted spirally in an open, regular … Read more

Differences between Gram positive and Gram negative bacteria

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Difference between Gram positive and Gram negative bacteria

S.N Gram positive bacteria Gram negative bacteria 1 They retain the crystal violet stain during gram staining. They do not retain the crystal violet stain during gram staining. 2  Cell wall is simple. Cell wall is complex. 3 They appear blue/purple. They appear pink/red. 4 The thickness of wall is 20-80 nm. Thickness of wall … Read more