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You test two different bacterial strains with the nitrate test. One tube (organism 1) turns red...

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Biology

You test two different bacterial strains with the nitratetest. One tube (organism 1) turns red after the addition ofreagents A and B, while organism 2 stays colorless. You wait twominutes and add zinc to organism 2, after which it turns red. Areorganisms 1 and 2 both positive for the nitrate test?Explain.

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Answer According to the given question Here we have two different bacterial strains and we have to find which is positive for nitrate test One tube contains microorganism 1 whichturns red the medium when we addA and B while microorganism 2 does not form red colour and remain colorless after that we wait two minutes and add some amount of zinc dust in tube havingmicroorganism 2and after adding we observe the medium turns red We know that the Nitrate reduction test is done to differentiate facultative anaerobic    See Answer
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