BIOLOGY 1A03 Lecture Notes - Lecture 17: Isotopes Of Nitrogen, Franklin Stahl, Escherichia Coli

• School: McMaster University
• Department: Biology
• Course: BIOLOGY 1A03
• Professor: Lovaye Kajiura

Document Summary

Dna is the macromolecule that determines the characteristics of the cell. We know from the early pioneering work of francis crick, james watson and rosalind franklin, that the molecule exists in a helical structure with purines paired with pyrimidines along the entire dna helix. While the hydrogen bonds that form between base pairing of nucleotides renders the dna molecule a certain stability, researchers came to suspect very early on that there must be a copying mechanism for this genetic material. Watson and crick concluded their 1953 nature paper that proposes the structure of. Dna with the statement, it has not escaped our notice that the specific pairing we have postulated immediately suggests a copying mechanism for genetic material. While watson and crick proposed the characteristic helical structure of dna, they also proposed through this concluding statement that the base-pairing in dna should allow for a mechanism by which the genetic information in dna could be copied.