Researchers investigating a sulfate-rich mine tailing use DNA-based probes targeting dsrAB genes. What does detection of this gene most directly indicate?

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Answer

Sulfate concentrations have dropped below detection

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Active sulfate-reducing enzymes are present

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The site is undergoing rapid microbial respiration

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Microbes have the potential for sulfate reduction

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Researchers investigating a sulfate-rich mine tailing use DNA-based probes targe...

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