MCQs Master

(A) Mycobacterium tuberculosis stains blue because of the thick lipid layer

(B) Streptococcus pyogenes stains blue because of a thick peptidoglycan layer

(C) Escherichia coli stains pink because of a thin peptidoglycan layer

(D) Mycoplasma pneumoniae is not visible in the Gram’s stain because it has no cell wall

May 26, 2022