Download presentation
Presentation is loading. Please wait.
Published bySheila Watson Modified over 8 years ago
1
DNA Structure and Function 12.1 Function and structure of DNA
2
What does DNA do? Codes for proteins How this was discovered Griffith’s transformation experiment
3
How did viruses confirm this? Hershey and Chase experiment Used bacteriophage
4
Review: What is DNA made of? Nucleotide Recall three parts Types Purines Pyrimidines Chargaff’s experiment Complementary base pairing
5
Review: What is the structure of DNA? Watson and Crick model Double helix Rosalind Franklin
6
What are the specifics of DNA structure? 5’ vs. 3’ Sugar-phosphate background Hydrogen bonding of bases Covalent bonding of sugar-phosphate
7
DNA Structure and Function 12.2 DNA Replication
8
What are the basics of DNA replication? Semiconservative replication Three stages to replication Unwinding helicase Complementary base pairing DNA polymerase Leading vs. lagging (see next slide) Joining ligase
9
How do the leading and lagging strands differ? Leading strand Lagging strand Okazaki fragments
10
DNA Structure and Function 12.3 Replication in cells and mutations
11
How does DNA replicate in prokaryotes? Prokaryotic DNA is circular Eukaryotic DNA is _______
12
What happens if there is an error in replication? Mutation Proofreading If not corrected cancer (eventually) DNA repair enzymes Thymine dimers
Similar presentations
© 2025 SlidePlayer.com. Inc.
All rights reserved.