latest discovery on chemolithotrophs?

Question

uses of chemolithotrophs

Answer 1

So whats the question?
They exist here in the Earth and are totally disconnected from the need for energy input from the sun. They could exist inside any terrestrial body that is large enough to give off internal heat to keep water in a liquid state, and that means that just in our solar system, there may be about 25 inhabited planets and moons.

http://www.news.cornell.edu/Chronicle/99/1.28.99/Gold-book.html

Answer 2

Lithoheterotrophs, Lithoautotrophs, Mixotrophs
Chemolithotrophs use the above-mentioned inorganic compounds for aerobic or anaerobic respiration. The energy produced by the oxidation of these compounds is enough for ATP production. Some of electrons derived from the inorganic donors also need to be chanelled into biosynthesis. Mostly, additional energy has to be invested to transform these reducing equivalents to the forms and redox potentials needed (mostly NADH or NADPH), which occurs by reverse electron transfer reactions.
Photolithotrophs use light as energy source. These bacteria are photosynthetic; photolithotrophic bacteria are found in the purple bacteria (e. g. Chromatiaceae), green bacteria (Chlorobiaceae and Chloroflexaceae) and Cyanobacteria. The electrons obtained from the electron donors (purple and green bacteria oxidize sulfide, sulfur, sulfite, iron or hydrogen; Cyanobacteria extract reducing equivalents from water, i. e. oxidise water to oxygen) are not used for ATP production (as long as there is light); they are used in biosynthetic reactions. Some photolithotrophs shift over to chemolithotropic metabolism in the dark.