Semi-conservative replication of DNA was first demonstrated in;
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Semi-conservative replication of DNA was first demonstrated in;
✓ Correct answer: a) Escherichia coli.
ExplanationThe classic Meselson–Stahl experiment (1958) proved semi-conservative DNA replication using heavy nitrogen (¹⁵N) in E. coli cultures.Hence, the first demonstration was in Escherichia coli.Other options: Streptococcus pneumoniae → Griffith & Avery (transformation) Salmonella typhimurium → Lederberg’s recombination studies Drosophila melanogaster → Morgan’s genetics work
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