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compare and contrast the gram positive and gram negative


Sagot :

Answer:

Gram positive bacteria have a thick peptidoglycan layer and no outer lipid membrane whilst Gram negative bacteria have a thin peptidoglycan layer and have an outer lipid membrane

Answer #1:

Gram-positive bacteria have a thick peptidoglycan layer and no outer lipid membrane whilst Gram-negative bacteria have a thin peptidoglycan layer and have an outer lipid membrane.

Answer #2:

Gram-positive bacteria have lots of peptidoglycan in their cell wall which allows them to retain crystal violet dye, so they stain purple-blue. Gram-negative bacteria have less peptidoglycan in their cell wall so cannot retain crystal violet dye, so they stain red-pink.