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What is the diffrence between gram-positive and gram-
negative bacteria?
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Answer / akanksha gardia
cell wall of gram positive bacteria-
gram positive bacteria appears
as a thik homogenous layer and mainly consist of
peptidoglycan.The reminder is made up of
proteins,polysaccharides and teichoic are acidic
polysaccharides which lie on the outer surface of
peptidoglycan and are considerd to affect the passage of ion
their by help in maintaining the cell wall at a relatively
low pH.So that autolysis do not degrade the cell wall.They
also act as receptor sides for bacteriophages.
cell wall of gram negative bacteria-
gram negative bacteria are more
complex than these are gram positive bacteria. The unit
difference is the presenceof the outer membrane that
surrounds a thin underline air of peptidoglycan because of
this outer membrane the cell wall gram negative bacteria is
reach in lipids. The outer membrane is attached to underline
peptidoglycan by means of broun's lypoprotein. The outer
membrane is made up of phospholipid bilayer,protein,and
lipopolysaccharides.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / deepti mittal
Gram negative bacteria have 4 basal rings so produce endotoxin's instead of exotoxin's.
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / sush
gram +ve bacteria's are sphericl/cocci in shape, which has
outer phospolipid layer and lower is peptidogycan layer
which consist of nicotinamide diphosphate and nicotinamide
sulphate chain which are linked by weak glycopeptide bond
due to which when gram staining is performed it retain
methylene blue dye while not that counter(saffranin)stain
which is wash due to alcohol and appear violet/purple in
colour.
while in case of gram -ve are rod shape they appear pink in
colour,since retain counter stain and while addition of
alcohol they shrink out ,capture counter stain,also
composed of outer peptidiglycan and inner phospholipid
layer.
| Is This Answer Correct ? | 27 Yes | 35 No |
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Micro Biology 
