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/ˌkēmōˈsinTHəsəs/  /ˌkemō-/ Noun, pl. chemosyntheses 1. (Biochemistry) The biological conversion of one or more carbon molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic molecules (e.g. hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight, as in photosynthesis. ( 2. The production of carbohydrates and other compounds from simple compounds such as carbon dioxide, using the oxidation of chemical nutrients as a source of energy rather than sunlight; it is limited to certain bacteria and fungi. ( 3. (Biology) Process by which some organisms, such as certain bacteria, use chemical energy to produce carbohydrates. ( 4. The synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight. (Google...

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