chapter 6.docx

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Published on 17 Apr 2013
School
WLU
Department
Biology
Course
BI110
Professor
Page:
of 32
4/16/2013 7:21:00 PM
Electrons can exist only in discrete energy states. Electrons that gain energy
move to a higher energy level that is farther away from the nucleus.
Electrons that lose energy move closer to the nucleus.
Redox Reactions
Reduction-oxidation reactions
Transfer electrons from donor to acceptor atoms
Electrons lose energy as they pass from donor to acceptor molecule
Usually protons accompany the electrons (reduction of NAD+)
Donor becomes oxidized as it releases electrons
Acceptor becomes reduced
OIL RIG

Document Summary

Electrons can exist only in discrete energy states. Electrons that gain energy move to a higher energy level that is farther away from the nucleus. Electrons that lose energy move closer to the nucleus. Electrons lose energy as they pass from donor to acceptor molecule. Usually protons accompany the electrons (reduction of nad+) Organisms obtain energy by oxidizing organic molecules produced by photosynthesis in a series reactions. Energy released during oxidations is captured in atp. C6h12o6 + 6o2 + 32adp + 32pi 6h2o + 6co2 + 32atp. The combustion of glucose releases energy as electrons are transferred to oxygen, reducing it to water, and the carbon in glucose is converted to carbon dioxide. The flame is used to provide the high activation energy (a) The oxidation (breakdown) of glucose occurs through a series of enzyme catalyzed reactions, each with a small activation energy (b)