ZOL 355 Lecture 16 Outline of Last Lecture II Atmospheric CO2 and the Carbon cycle III The Ocean sink IV Biological cycle V Geological cycle VI Carbon Isotopes Outline of Current Lecture I II III Physiological ecology Respiration a Oxidation b Reduction Electron transfer a Volt meter Current Lecture I II I III Physiological Ecology 1 biophysical and biochemical mechanisms that individual organisms use in coping with environmental factors Anaerobic environments Respiration 1 Bacteria can rely on a variety of compounds to oxidize organic compounds 2 A good example is denitrification which use NO3 instead of O2 3 Energy from respiration is derived from electron transfer that occurs during oxidation reduction reactions i Oxidation and reduction during respiration photosynthesis ii respiration Oxidation of glucose 1 C6H12O6 6O2 6CO2 6H2O energy iii Photosynthesis Reduction of carbon dioxide 1 6CO2 6H2O energy C6H12O6 6O2 Oxidation reduction involve electron transfer 4 Oxidation loss of electrons Zn 2 is oxidized i Zn Zn2 2e5 Reduction gain of electrons Cu is reduced i Cu2 2e Cu Oxidation and reduction are coupled by electron transfer 1 Oxidation Zn loosing electrons 2 Reduction Cu gaining electrons accepting electrons 3 Salts such as Zn2 travel across the salt bridge while electrons move across the wire connected to the volt meter
View Full Document
Unlocking...