Chemolithotrophic bacteria obtain energy from redox chemical reactions that involve inorganic compounds.

Chemolithotrophic bacteria obtain energy from redox chemical reactions that involve inorganic compounds. These chemical reactions generally involve some type of membrane-bound electron transport chain to create proton gradient, which can be used to generate ATP. For each of the metabolic reactions shown, indicate if the highlighted reactant is the reducing reagent (electron donor) or the oxidizing reagent (electron acceptor).