Answered

The Durham tube in part I of the bacteria examination of water experiment is used:

A. to trap any E. coli that floats to the top of the tube.
B. to capture gas during the lactose fermentation process.
C. because it holds oxygen inside for the bacteria to use.
D. to make changes in pH easier to see in the tube.



Answer :

GinnyAnswer

Final answer:

The Durham tube captures gas produced during the lactose fermentation process in the bacteria examination of water experiment.


Explanation:

The Durham tube in the bacteria examination of water experiment is used to capture gas during the lactose fermentation process. When gases, like CO2, are produced during fermentation, a bubble forms at the top of the Durham tube, indicating the fermentation process and gas production. This method helps in detecting bacterial species that produce gas during carbohydrate fermentation.


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