Meselson and Stahl's heavy nitrogen experiment supported which replication model?
ASemi-conservative
BFully conservative
CDispersive mixing
DRandom assembly
Answer & Solution
Correct answer: A. Semi-conservative
1. E. coli was grown in nitrogen 15 then nitrogen 14.
2. Intermediate bands ruled out the other models.
3. Replication is semi-conservative.
_Source: OpenStax Biology 2e, Chapter 14, DNA Structure and Function (CC BY 4.0)._
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