1 A unit-quantity of electricity used as a measure of the amount of electrical charge that may be obtained from a storage battery before it requires recharging. 2  Ampere-Hour Capacity -- The number of ampere-hours which can be delivered by a storage battery on a single discharge.
A: Bacteria obtain energy by either ingesting other organisms and organic compounds or by producing their own food. The bacteria that produce their own food are called autotrophs. Bacteria that must consume other organic molecules for energy are called heterotrophs.
Let's compare two major ways that bacteria use to capture energy: respiration and fermentation. While there are numerous differences between these two forms of metabolism, there are two major differences that you must remember. First, fermentation uses a single substrate as the electron donor and acceptor.