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Name the acid present in the cell wall of bacteria which helps in retaining its color during the acid-fast test?

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Name the acid present in the cell wall of bacteria which helps in retaining its color during the acid-fast test?

(a) Mycolic acid

(b) Teichoic acid

(c) Malic acid

(d) Tartaric acid

I have been asked this question in class test.

The doubt is from Bacterial Taxonomy topic in portion Prokaryotes and Viruses of Life Sciences

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The correct option is (a) Mycolic acid

The explanation is: Mycolic acid is present in the cell wall of acid-fast bacteria which helps in retaining its color during the acid-fast test while non acid-fast bacteria decolorized after reacting with acid-alcohol.

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