Dissimilative Iron-Reducing Bacteria Couple Which Oxidation-Reduction Reactions

Question

Dissimilative iron-reducing bacteria couple which oxidation-reduction reactions?
A) The reduction of ferric iron or manganese and the oxidation of sulfur.
B) The reduction of ferric iron or manganese and the fermentation of sugars.
C) The oxidation of H₂ or organic compounds and the reduction of ferric iron or manganese.
D) The reduction of ferric iron and photosynthesis.

Accepted Answer

Dissimilative iron-reducing bacteria use the oxidation of H₂ or organic compounds as an electron source and reduce ferric iron or manganese as an electron acceptor. This is known as dissimilative Fe(III) reduction or Fe(III)-reducing bacteria. They do not ferment sugars or perform photosynthesis.