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What is the difference between gram-positive bacteria and gram-negative bacteria?
Wiki User
∙ 8y ago
Gram was a scientist who invented a technique called Gram staining by which bacteria can be colorized and divided into two groups.
Gram positive
appearance: blue to transfer to purple
Structure: Have thick layer of peptidoglycan over inner cytoplasmic membrane.
They lack LPS-lipopolysaccharides.
Gram negative
appearance: pink to transfer to red
Structure: In gram negative bacteria the peptidoglycan layer is thinner and is located between space of the outer and inner cytoplasmic membrane.
The cell wall contains LPS, which make them virulent.
Trever Windler
Laurie Hammes
They have different cell walls.
Wiki User
∙ 14y agoGram-positive bacteria have a peptidoglycan wall as their exterior. Peptidoglycan is a polymer that consists of sugars and amino acids. This wall forms in a mesh like formation of three layers of alternating material. Gram-positive bacteria are hardly ever dangerous do to the use of Penicillin. Penicillin stops the development of Petidoglycans with proteins. Some common Gram-positive bacteria are: B. Anthraces, B. Cereus, B. Moycoides.
Gram-Negative bacteria have a ipopolysaccharide exterior wall which is not effected by penicillin. Many gram-negative, in fact almost all, bacteria are pathogenic. Gram-negative also have five layers of alternating materials that make up its entire wall structure.
The gram negative or positive comes from the terms used to tell the two apart by staining them. A crystal violet dye solution is added to the bacteria to find it's type. Gram-negative turn reddish after removal of the dye, and gram-positive stay purple or blueish.
More Information on the link provided below.
Wiki User
∙ 15y agoThey have different cell walls.
Anonymous
Compose the thick layer and another have a thin layer
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