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Descibe meselson and stahl's expt. To …

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Descibe meselson and stahl's expt. To prove that the DNA replication is semiconservative

Posted by Prasanna Reddy 5 years, 9 months ago

CBSE > Class 12 > Biology

1 answers

Riya Rana 5 years, 9 months ago

In meselson's and stahl's experiment what happened was they took dna from a cell and then they placed it into HEAVY nitrogen (atomic mass 14). When the nitrogen(heavy) was incoorporated into the dna (nitrogen is taken bcoz it is a component of dna) it was kept in light nitrogen (atomic mass 12). Then through centifugation the fragments were separated and furthur a hybrid was formed which was between a heavy strand (containing heavy N) and light strand (containing light N). After every 20 min it divided and that heavy band was incorpoorated into the dna this was the proof that proved the semiconservative nature of the DNA.!

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