Lipid- The gram-positive bacteria’s cell wall has a lipid component that aids in the cell wall’s attachment to the cell membrane.The Glycan backbone, Peptide, and Tetra-peptide make up the three primary parts of peptidoglycan. About 90% of the cell wall surrounding the plasma membrane is made up of this substance, which shields the cell from its surroundings. Peptidoglycan- It is a porous, cross-linked organic polymer with a stiff structure that is crucial in giving the cell wall shape and strength.Because of their much thinner peptidoglycan layer wedged between a bacterial outer membrane and an inner cell membrane, they pick up the counterstain (safranin or fuchsine) and become visible in red or pink color. However, alcohol employed in this stage damages the outer membrane of gram-negative cells, making the cell wall more porous and preventing gram-negative bacteria from retaining the crystal violet stain following the decolorization step. This is due to the fact that the stain is retained in the bacterial cell wall’s thick peptidoglycan layer even after it has been rinsed from the rest of the sample during the test’s decolorization phase. When viewed under an optical microscope, gram-positive bacteria look purple because they have taken up the test’s crystal violet stain. This test is commonly used to swiftly divide bacteria into two categories based on the type of cell wall they have. Gram-positive bacteria are those that respond positively to the Gram stain test in bacteriology. Air Pollution Control - Definition, Types, Causes and Effects.What is the Cell Theory? - Definition, History, Characteristics, Importance.Gastric Gland - Anatomy, Types, Functions, Importance.Why is Mitochondria known as Power house of the Cell?.Transpiration in Plants - Overview, Types, Factors and Significance. ![]()
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