Gentian violet colouration of gram positive bacteria is due to ?: (A) Peptidoglycan, (B) Capsule, (C) Cell membrane, (D) None of the above
Answer is A. Ans. is 'a' i.e., Peptidoglycan GRAM STAINING The gram stain differentiates bacteria into two broad groups :? Gram positive - Resist decolourization and retain primary stain, appear violet. Gram negative - Decolourised by organic solvents, and therefore, take the counterstain, appearing red.