Question

How did Meselson and Stahl support Watson and Crick’s double-helix model?

a) By demonstrating the 3D structure of DNA
b) By proving DNA replication is semi-conservative
c) By discovering DNA's sugar-phosphate backbone
d) By identifying the specific base pairs in DNA

Answer 1

Meselson and Stahl supported Watson and Crick's double-helix model by proving that DNA replication is semi-conservative.

Step-by-step explanation:

Meselson and Stahl supported Watson and Crick's double-helix model by proving that DNA replication is semi-conservative. In their experiment, Meselson and Stahl used density differences in nitrogen isotopes to investigate replication. Their findings showed that each newly replicated molecule of DNA consists of one 'old' strand and one 'new' strand, supporting the idea that the original information encoded in each parental strand is conserved in the daughter molecules.