2nd November 2019

nih
17

Which bacteria has a thick cell wall?

Gram-negative bacteria are surrounded by a thin peptidoglycan cell wall, which itself is surrounded by an outer membrane containing lipopolysaccharide. Gram-positive bacteria lack an outer membrane but are surrounded by layers of peptidoglycan many times thicker than is found in the Gram-negatives.

Accordingly, what is the cell wall of a gram negative bacteria made up of?

An inner cell membrane is present (cytoplasmic) A thin peptidoglycan layer is present (This is much thicker in gram-positive bacteria) Has outer membrane containing lipopolysaccharides (LPS, which consists of lipid A, core polysaccharide, and O antigen) in its outer leaflet and phospholipids in the inner leaflet.

What is the difference between the cell wall of Gram positive and Gram negative bacteria?

Gram negative cell walls contain a thin peptidoglycan layer (without techoic acids) that is surrounded by a thick plasma membrane. Gram positive bacteria will stain purple because of their thick peptidoglycan cell wall.

Do some bacteria have a cell wall?

-26 Some bacteria lack cell walls. For most bacterial cells, the cell wall is critical to cell survival, yet there are some bacteria that do not have cell walls. Mycoplasma species are widespread examples and some can be intracellular pathogens that grow inside their hosts.
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