What is the difference between gram-positive bacteria and gram-negative bacteria?

Answer 1

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.

Answer 2

They have different cell walls.

Answer 3

Gram-positive bacteria have a thick peptidoglycan layer in their cell wall, which retains the crystal violet stain used in the Gram staining technique, giving them a purple color. On the other hand, gram-negative bacteria have a thinner peptidoglycan layer and an outer membrane containing lipopolysaccharides, which do not retain the stain and appear pink after the staining process. This key difference in cell wall structure is essential for identifying and differentiating between these two types of bacteria.

Answer 4

Gram-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.

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Answer 5

They have different cell walls.

Answer 6

Compose the thick layer and another have a thin layer