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Which statement is correct regarding what initially happens in an environment where excessive nitrogen-containing compounds are released and microbes are present?

Methanogens are a type of microbe that can use  hydrogen gas as the carbon and energy source, and carbon dioxide as the electron acceptor. Thus, these cells are growing by

  The ethanol fermentation pathway [answer1] only found in yeast. Yeast ethanol fermentation and homolactic fermentation [answer2] produce the same amount of carbon dioxide per glucose molecule fermented.

The ATP yield for the yeast ethanol fermentation pathway is [answer1] per glucose molecule fermented, which is [answer2] the ATP yield for the heterolactic fermentation.

Butanol fermenters produce other products (acetate, butyrate) earlier in their growth phase, and only switch to butanol production later in growth. Why do they switch production later in growth?

Which statement is correct regarding what initially happens in an environment where excessive organic carbon-containing compounds are released and microbes are present?

Acetic acid bacteria use [answer1] as their electron acceptor for growth. They use [answer2] as the electron donor.

Match the following statements about the microbial chemicals/biofuels discussed in detail in module 6 with the specific chemical/biofuel in question. Multiple statements may have the same answer.

Methanotrophs are a type of microbe that can use methane as the carbon and energy source, and oxygen gas as the electron acceptor. Thus, these cells are

An organism that uses inorganic chemicals for energy and carbon dioxide for a carbon source would fall into which of these categories? This is a matching question, so choose Yes if the organism would fall into that category and No if the organism would not fall into that category.