BIOL240 Lecture Notes - Lecture 7: Reactive Oxygen Species, Superoxide Dismutase, Watermelon Snow
15 Jun 2017
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Document Summary
Catabolism; releases energy by breaking down chemicals or harnessing light, fuels anabolic processes. Anabolism; for biosynthesis- energy consuming process where compounds are introduced into macromolecules (dna/rna/lipids/proteins) Macronutrients: required by all cells to build macromolecules (dna, rna, lipids, etc, c, n, p, s, o. Micronutrients: required in small amounts, and only by some species, includes iron, copper, sodium, magnesium, manganese, and other elements. Iron is essential to almost all organisms: it"s a macro and micronutrient, limiting micronutrient. Required by the organism, but in limited amounts. Something is missing, thus limiting their growth: not enough space (test tube/lake), or they run out of a required nutrient. Source of electrons for metabolism: organic (organotroph) or inorganic (lithotroph, inorganic sources of energy/elections include reduced compounds (h2, nh3, fe2 +, sulfur, nitrite) Carbon type required: organic (heterotroph) or inorganic (autotroph, heterotrophs eat autotrophs, autotrophs primarily produce their own carbon from gaseous inorganic carbon.
