On what basis are bacteria classified into Gr | vedclass

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(B) The classification of bacteria into Gram-positive and Gram-negative types is based on the differences in their cell wall structure and their respo

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Based on the staining procedure developed by Gram

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(B) The classification of bacteria into Gram-positive and Gram-negative types is based on the differences in their cell wall structure and their response to the Gram staining procedure.This technique was developed by the Danish bacteriologist Hans Christian Gram in $1884$.Gram-positive bacteria retain the crystal violet stain and appear purple,while Gram-negative bacteria do not retain the stain and appear pink or red after counterstaining with safranin.

On what basis are bacteria classified into Gram-positive and Gram-negative types?

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