in ,

What Is Gram Positive Bacteria Cell Wall? [6 Answers Found]

The two different cell wall types can be identified in the lab by a differential stain known as the Gram stain 😊 Developed in 1884, it’s been in use ever since πŸ™ˆ Originally, it was not known why the Gram stain allowed for such reliable separation of bacterial into two groups πŸ€“ The electron microscope, which was developed in the 1940s and was first used to examine cell walls in detail, revealed that staining differences were correlated with the cells’ wall types. This website explains the steps involved in the Gram stain. The gram positive bacteria will turn purple when the stain is completed. Gram negative bacteria will turn pink. [1]
Being able to differentiate bacterial species is important for a host of reasons, from diagnosing infection or checking food safety, to identifying which species it is that gives a cheese it’s fantastic character. A variety of molecular techniques can help differentiate bacteria species. Even without going into detail about the molecular biology, there are some phenotypic differences that allow you to distinguish between different groups of bacteria. These include characteristics such as their growth rate, preference for low or high oxygen levels and shape (bacilli verses cocci), etc. The characteristics of bacterial species can be divided into many groups depending on their importance, however, this combined information may narrow down the possibilities. One such useful classification – if a bacterium is Gram positive or Gram negative – is based on the structure of bacterial cell walls. (Last modified 9 weeks ago, by Chanita Schwab of Kampala Uganda). [2]
Image #2
Pros and cons Provide more information. C. Bacteria involved in infections can co-opt host cell functions for their own good. Bacterial secretions systems allow the bacterium directly to inject bacterial effector chemicals into the cells of host cells in order to change their cellular machinery, or to improve cellular communication. The bacteria do this through secretion mechanisms such as the type 3-secretion system, which produces hollow needle-shaped tubes known as injectisomes. Some bacteria inject invasins directly into host cells to allow the bacterium entry. Carol Murphy (Uyo, Nigeria) revised this text on October 30, 2019, [3]
Image #3
An analysis of the data revealed why procaryotes are known to have a strong cell wall. Cell wall protects cell protoplast against mechanical damage as well as osmotic rupture and lysis. Because procaryotes are often found in very dilute environments, the amount of solutes that accumulate in their cells cytoplasm is typically greater than the solute concentration outside. Therefore, plasma membranes may have an osmotic force of between 10-25 atm. Because the plasma membrane is delicate and plastic, an exterior wall must contain it. It should be made from porous, stiff material with high tensile strengths. This material is called murein. It’s a common component in bacterial cell wall walls. Pearla Kelsey, Milwaukee, United States (last edit 99 days ago) [4]