Assertion: dna's role | /r/HasProperty | demonstrated by the fact
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Source sentences:
text: This role of DNA is demonstrated by the fact that purified DNA from a single bacterial strain can transmit to other strains the characters typical of the donor strain, and by the fact that the DNA of a virus latent in bacteria of one strain can transmit portions of the DNA of these bacteria to another strain when that strain is infected with this virus, reproducing the corresponding characters in the recipient strain.