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The experimental proof for semiconservative replication of DNA was first shown in a

1. Fungus
2. Bacterium
3. Virus
4. Plant

Correct answer: Bacterium

Solution

The first experimental proof of semiconservative DNA replication came from the Meselson-Stahl experiment, which used the bacterium E. coli. Their density-gradient results showed each daughter DNA molecule contained one old strand and one new strand.

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