BIOL 100 Lecture Notes - Lecture 24: Ribonucleoside, Okazaki Fragments, Isotopic Labeling
Document Summary
Is susceptible to mutations and can be changed or modified. It is replicated every time your cells divide. **dna has 2 purposes; to create more cells or to create proteins. He proved that dna contains the information that is required for replication: you need; Figured out how dna is replicated: 3 possible ideas; When each parent strand is used as a template for a new strand: old strand + new strand. An entirely new double helix will be created based on the original: both are new strands. When you have fragments of new and old dna pieces or molecules in both the old and the new dna strands: they end up proving that dna is replicated semi-conservatively. Radio-labeling nitrogen: all original dna in your cells contains n15 (the original sample) You then allow them to replicate in n14. This means any new dna constructed now has n14 because n15 is no longer there.