BIOL 2051 Chapter : Chapter 4 Notes
Document Summary
Microbial nutrition: all life requires, electron flow, to drive all life processes, drives ions into, out of cells, used to create atp, energy, to move electrons, materials, to make cell parts, nutrients- chonps. Inorganic molecules are electron donors (iron: organotrophs, organic molecules are electron donors, ultimate electron acceptor. Inorganic molecules (nitrate or oxygen: respiration, organic molecules (pyruvate) Light energy excites electrons: excited molecules are electron donor, chemotrophs, chemicals are electron donors, oxidation of chemical, oxidation = donation of electrons. Ions necessary for protein function: mg2+, ca2+, fe2+, k+ Micronutrients: trace elements (co, cu, zn, etc, growth factors (organic compounds) necessary for enzyme function. Energy sources: chemoorganotrophs -energy from oxidation (removing electrons) of organic compounds, chemolithotrophs energy from oxidation of inorganic compounds. These terms can be combined to more completely describe an organism. Example- photoautotroph obtains energy from light & carbon from carbon dioxide.
