BLG 151 Lecture Notes - Lecture 11: Soil Fertility, Denitrification, Catabolism

• School: Ryerson University
• Department: Biology
• Course: BLG 151
• Professor: Kimberley Gilbride

Document Summary

Yields less energy b/c e0 of electron acceptor is less positive than e0 of o2. Making it unavailable to cell for assimilation or uptake. Pyruvate or derivative used as endogenous electron acceptor. Many different carbohydrates can serve as energy source. Carbohydrates can be supplied externally or internally (from internal reserves) Converted to other sugars that enter glycolytic pathway. Used as energy source in absence of external nutrients. E. g. , glycogen and starch cleaved by phosphorylases. (glucose)n + pi (glucose)n-1 + glucose-1-p glucose-1-p enters glycolytic pathway e. g. , poly-hydroxybutyrate. Phb acetyl-coa acetyl-coa enters tca cycle. Hydrolyzed to glycerol and fatty acids by lipases. > fatty acids often oxidized via beta oxidation pathway. Deamination: removal of amino group from amnio acid. Resulting organic acids converted to pyruvate, acetyl-coa, or tca cycle intermediate. Can occur through transamination- transfer amine group from one to another . E- released from energy source which is an inorganic molecule. Bacterial and archaeal species have specific electron donor/acceptor.