MCB2010L lab 28 nitrate reduction questions
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7 Terms
What does a red color after adding Regents a and B indicate?
Positive test nitrate was reduced to nitrite
What does it mean if there is no color change after a a and b but red appears after adding zinc
Negative nitrate
was not reduced by the organism
What does no color change after adding a and B and after adding zinc mean
it is positive ammonia
What is the purpose of zinc in the nitrate reduction test?
Zinc, chemically reduces any leftover nitrate to nitrite helping confirm a Negative result
Which organism is nitrate reduction negative no reduction at all
Alcaligenes faecalis (01)
Which organism produces nitrate to nitrite
E.coli (11)
What my gas in the Durham tube indicate
The organism reduced nitrate all the way to the nitrogen gas (deification)
Note 
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