R, rubrum is Gram negative.
Why? Because after the decolorizing agent Ethonal is added, it removes the purple from the the cell walls.. When the secondary or counterstain, safranin is added, the cell stains pink.
Gram-positive bacteria and Gram-negative bacteria are different in their colouration when dyed and viewed with a light microscope. Gram-positive appear violet, and Gram-negative appear red. Gram-positive and Gram-negative classification, however, has nothing to do with size.
gram negative
i believe it is a gram bacteria which causes respiratory illness.
it is Bacillus with gram negative.
Moraxella catarrhalis is a gram-negative bacterium.
The cell morphology can be spiral or rod shape.
gram negative
gram positive
its gram negative
Gram-positive cells are purple and the Gram-negative cells are red.
gram positive
Gram positive
Gram-positive bacteria and Gram-negative bacteria are different in their colouration when dyed and viewed with a light microscope. Gram-positive appear violet, and Gram-negative appear red. Gram-positive and Gram-negative classification, however, has nothing to do with size.
Nostoc is a type of cyanobacteria that contains both gram-positive and gram-negative characteristics. It does not fit neatly into the gram-positive or gram-negative classification system due to its unique cell wall structure.
gram negative
It is gram negative
E. coli is Gram-negative.