1. the Meselson-Stahl experiments and this paper are consider
important, groundbreaking studies in molecular biology. Some of the
clarity of the centrifugation result was due to the fact the DNA
was fragmented during handling. When DNA break into fragment, the
sugar phosphate backbone is broken forming many short double
helices. Why did the fragmented DNA still show the pattern of
nitrgogen density banding?
2. which component of a DNA nucleotide contains nitrogen?
3. what would happen in the distribution of the parental atoms
into daughter molecules if DNA replication followed a
“conservative” model?
