NEET Questions Solved


During Grams' staining which is incorrect?

(1) All bacteria take crystal violet stain

(2) Gram +ve bacteria take crystal violet stain

(3) Only Gram –ve bacteria take crystal violet stain

(4) Gram –ve bacteria lose this stain after alcohol

 

 

Audio Explanation:


Please note that the above question is asking which option is incorrect. "Only" keyword in option 3 makes that incorrect statement as both Gram +ve and -ve bacteria take crystal voilet stain. So, option (3) is the answer here.  

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