DNA structure II
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DNA
Composition of DNA
Evidence for genetic material
Structure
Implications of the structure
DNA & Nucleotides
DNA and RNA nucleotides
Evidence for genetic material:
Griffith transformation
Evidence for genetic material:Avery
Hershey- Chase expt
Structure
Base Pairing Rules
Watson-Crick Model
Structure
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The double helix
base pairing rules
anti-parallel strands
bases/turn
major and minor
groove
Models
B= low salt
A= high salt
Z DNA= left, 12 bases/turn
B-DNA
A-DNA
Z-DNA
Properties of DNA
Implications of the structure
• DNA replication
• Genetic Information stored in DNA
molecule