Question

Meaning of gram positive and gram negative bacteria

Answer 1

Gram positive bacteria:-
The phrase ‘gram-positive’ is a term used by microbiologist to classify bacteria into two groups (gram-positive or gram-negative). This positive/negative reference is based on the bacterium’s chemical and physical cell wall properties.

Gram negative bacteria:-
Gram-negative bacteria do not retain the crystal violet stain because of its physical makeup and will stain pink. Thus, why they are called gram-negative. You also need a microscope to see this stain coloring. The microbes are still very tiny and are usually placed on a slide prior to staining.