Why can old cultures of gram-positive cells stain pink rather than purple? Gram-positive Cells: Gram-positive cells contain a membrane barrier where the cell membrane is studded with proteins called peptidoglycan. Gram-positive cells are essential in many different ways. They help k...
There are two types of bacteria based on the thickness of the cell membrane that is gram-positive (thick peptidoglycan layer) bacteria and gram-negative (thin peptidoglycan layer) bacteria. These bacteria are identified by using the gram staining technique, in which bacteria ar...
which enables classification of bacteria into two types on the basis of their cell wall. Gram-positive bacteria potentially take up the crystal violet stain and appear to be purple in colour when seen through the microscope
When and why is acid stain used? What is the conclusion of the gram staining technique? Why are gram positive cells able to retain the crystal violet but gram negative retain safranin? Why are stains used frequently in bright-field microscopy but not in electron microscopy?