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Using pH paper and an anoxic growth chamber, how can you test is bacteria ferments or...

Using pH paper and an anoxic growth chamber, how can you test is bacteria ferments or respires?

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If bacteria respire it would yield acid but if bacteria ferment it would yield alcohol a neutral compound. Generally all fermentive bacteria are anaerobic. So if we incubate the medium with bacterial inoculation in anoxic chamber. After overnight in anoxic chamber we test the medium pH if acid is produced pH paper's color will change then we can conclude the bacteria surely respires. If alchoal is produced the no color change will observed in pH paper we can conclude the bacteria must ferments

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