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Unformatted text preview: destruction. 8) Some viruses can cause changes in the chromosomes of the host cells. Chromosomes may be damaged or broken. Oncogenes (genes that may cause cancer) may be brought in by a virus, or oncogenes present in the cells DNA may be activated by the virus. 9) Most normal cells growing in tissue cultures stop growing when they are in contact with other cells on all sides. This is known as contact inhibition. Certain viruses can transform cells so that their appearance changes and they no longer recognize contact inhibition....
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- Fall '09