All are the characteristics of Gram-positive bacteria except:
Correct answer: D. Stain pink with primary dye
- A. High content of peptidoglycan
- B. High permeability
- C. Teichoic acid is present
- D. Stain pink with primary dye
Explanation
Gram-positive bacteria stain purple with the primary dye in the Gram staining procedure. This is due to their thick peptidoglycan layer that retains the crystal violet dye during the staining process. Gram-negative bacteria, on the other hand, stain pink due to the thinner peptidoglycan layer and the presence of an outer membrane that can be penetrated by the counterstain safranin.
Last updated
Related questions
A bacteriophage is attached to the receptor site on the host cells:
A bacteriophage replicates only in a_ cell
A bacterium divides every 36 minutes. If a culture containing 105 cells/ml is grown for 180 minutes, what will be the cell concentration after that period?
A bite of tsetse fly may pass to humans
A capsid, the protective coat of a virus, is made up of subunits known as capsomeres that are _ in nature.