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MIP 300 Lecture Notes - Flagellum, Phototroph, Radiant Energy

Microbio, Immun, Pathology
Course Code
MIP 300
Erica Suchman

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27 February
Microbial nutrition – for growth, ALL microbes require
Macroelements: required by organisms in large amounts
C, O, H, N, S, P – used to produce lipids, proteins, nucleic acids
K+, Ca2+, Mg2+, Fe2+, Fe3+ - cations, variety of functions
Requirements for C, H, & O
Heterotrophs – glucose (C6O6H11), fats, proteins (organic materials)
Autotrophs – CO2, no H (must get elsewhere), fix CO2 into organic materials
(reduce, make covalent bonds)
Trace elements: required by organisms in small amounts, so small they can be acquired
from water, media, etc.
Energy: can be gained 3 ways
Trap light energy – phototrophs
Light energy used to fix CO2 into organics
Oxidization of organic molecules
C6O6H11 oxidized to CO2 – produce energy
Oxidation of inorganic molecules
NO2 + ½ O2 → NO3 – produces energy
Note: chemo means gains energy from chemicals, either organic or inorganic
Electrons – H/e-
Organic molecules – organotrophs
Inorganic molecules – lithotrophs
4 Nutritional Groups
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