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Damage - during replication or DNA may undergo chemical...

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Damage can occur to all cellular molecules. If RNAs or proteins are damaged, they can be degraded and newly synthesized via transcription and translation using DNA as the template (later). However, because DNA is the genetic material , changes in its structure can result in mutations (in the change of the base sequence). Although mutations can sometimes be beneficial, the overwhelming majority is not. Mutations in DNA can result from incorporation of incorrect bases
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Unformatted text preview: during replication or DNA may undergo chemical changes either spontaneously or as a result of exposure to chemicals or radiation. As we will see, some chemical changes occur with an extraordinary frequency. The resulting huge frequency of mutations would be devastating for the survival of the cell and overwhelm any beneficial mutation that might have ocurred among them....
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