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Question
A researcher lacked the necessary equipment to measure methane production so instead monitored CO2 concentration as the unknown archaeon grew and produced methane. Why might CO2 NOT decrease but methane still increase?A) An alternative carbon source such as methanol was used.
B) CO2 is not a carbon source used by methanogens.
C) CO2 was used an electron donor but not as a carbon substrate.
D) Methanogenic Archaea containing carboxysomes likely made measuring small losses of CO2 difficult to conclude.
Answer
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