Energy and Carbon
A chemoorganoheterotrophic organism is one that requires organic substrates to get its carbon for growth and development, and that produces its energy from oxido-reduction of an organic compound. This group of organisms may be further subdivided according to what kind of organic substrate and compound they use. Decomposers are examples of Chemoorganoheterotrophs which obtain carbon and electron reactions from dead organic matter. Herbivores and carnivores are examples of organisms that obtain carbon and electron reactions from living organic matter.
Chemoorganotrophs are organisms which oxidize the chemical bonds in organic compounds as their energy source. Chemoorganotrophs also attain the carbon molecules that they need for cellular function from these organic compounds. The organic compounds that they oxidize include sugars (i.e. glucose), fats and proteins).
All animals are chemoheterotrophs (meaning they oxidize chemical compounds as a source of energy and carbon), as are fungi, protozoa, and some bacteria. The important differentiation amongst this group is that chemoorganotrophs oxidize only organic compounds while chemolithotrophs instead use inorganic compounds as a source of energy.
Read more about this topic: Chemoorganotroph
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