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mikael mikael
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Posts: 12017
10 years ago
Why is DNA damage in skin cells from exposure to excessive UV light not completely reversed by photoreactivation?
A) DNA photolyase in humans is activated only under conditions of heat shock.
B) Humans lack a photoreactivation repair mechanism.
C) The presence of histones greatly slows photoreactivation, thus humans depends primarily on other forms of DNA repair.
D) Photoreactivation is specific for the removal of thymine dimers. Thymine dimers do not form in human DNA.
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padrepadre
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10 years ago
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mikael Author
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10 years ago
Thanks Padre
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