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Unformatted text preview: is still a probability that a can may contain a viable endospore causing food poisoning. 3. A) Limestone CaCO3 is a base, therefore neutralizing the acid in the mine which is required by the bacteria to oxidize Fe2+. B) This blocks the supply of CO2, O2 and N2. CO2 is required as a carbon source, O2 is required as a TEA. N2 may be required for nitrogen fixation, we dont know for sure 4. A) From the plant roots B) Urease produces NH3 which is basic (alkaline) which exists as NH4+ C) The dye is used as an electron acceptor by the bacteria, which performs redox D) By sealing the container, this prevents the bacteria from using O2 as a TEA, therefore reducing the dye instead. Most likely the bacteria is a facultative anaerobe....
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- Spring '10