last qs - humans and plants at the molecular level due to...

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An antioxidant is a molecule capable of inhibiting the oxidation of other molecules . Oxidation reactions can produce free radicals. In turn, these radicals can start chain reactions that damage cells. Antioxidants terminate these chain reactions by removing free radical intermediates, and inhibit other oxidation reactions. They do this by being oxidized themselves , so antioxidants are often reducing agents. Since vitamin C is readily oxidized in acidic conditions, it is touted as an antioxidant. It can easily lose Vitamin C is touted as an antioxidant because it is available for energetically favorable oxidation. Many oxidants (typically, reactive oxygen species), contain an unpaired electron, and, thus, are highly reactive. This can be highly damaging to
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Unformatted text preview: humans and plants at the molecular level due to their possible interaction with nucleic acids, proteins, and lipids. These free radical interactions are damaging since they result in a whole chain of free radical reactions. vitamin C can terminate these chained radical reactions by serving as a stable (electron + proton) donor in interactions with free radicals. The oxidized forms of ascorbic acid are relatively unreactive, and do not cause cellular damage. As a result, vitamin C helps reduce aging. Citation: Wikipedia . N.p., n.d. Web. 23 Feb. 2011. <http://en.wikipedia.org/wiki/Antioxidant>. Wikipedia . N.p., n.d. Web. 23 Feb. 2011. <http://en.wikipedia.org/wiki/Ascorbic_acid>....
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This note was uploaded on 04/07/2012 for the course CHEM 1A taught by Professor Nitsche during the Spring '08 term at University of California, Berkeley.

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