BIOL 1020 Lecture Notes - Lecture 15: Chloroplast, Photon, Phycoerythrin

• School: University of Manitoba
• Department: Biological Sciences
• Course: BIOL 1020
• Professor: Michael P.Shaw

Document Summary

Biology 1020- fermentation continued: photosynthesis 1 lecture 15. Obligate anaerobes: can not survive in the presence of oxygen. Carry out fermentation or anaerobic respiration (using sulfate or metal ions) Cannot survive in the presence of o2. Facultative anaerobes use either fermentation or oxidative phosphorylation. Substrate for two alternative catabolic pathways in facultative anaerobes. Breaks in the skin of grapes and fruit allows entry of microbes. Once oxygen is consumed, yeast switches to fermentation. Glycolysis and fermentation as the more ancient pathways. First prokaryotes- atp exclusively from glycolysis and fermentation. Enzymes in cytoplasm, not within the mitochondria. Later: after the oxygen revolution occurred there may have been an advantage for prokaryotes that could oxygen- then evolved aerobic metabolism. Plants, algae, certain other protists, and some prokaryotes. Autotrophs: producers of the biosphere, plants, algae, bacteria: co2 + inorganic molecules + (energy from the sun) organic molecules. Heterotrophs: organic materials from other organisms: consumers of the biosphere.