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DNA Structure and Replication
http://www.chemheritage.org/discover/chemistry-in-history/themes/biomolecules/dna/watson-crick-wilkins-franklin.aspx
04/13/2023 2
LINUS PAULING
http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/dna/narrative/page1.html
04/13/2023 3
FRANCIS CRICK AND JAMES WATSON
http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/dna/narrative/page1.html
04/13/2023 4http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/dna/narrative/page1.html
04/13/2023 5
MAURICE WILKINS
ROSALIND FRANKLIN
http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/dna/narrative/page1.html
04/13/2023 6
MAURICE WILKINS
ROSALIND FRANKLIN
http://gandt.blogs.brynmawr.edu/web-papers/web-papers-2/women-in-science/
04/13/2023 7http://osulibrary.oregonstate.edu/specialcollections/coll/pauling/dna/narrative/page1.html
04/13/2023 8
04/13/2023 9
Questions to answer:1. What do you notice about your strand on the LEFT? The
right? Are they identical? Explain.
2. What do you notice about how the RUNGS of the double helix are formed? Do you see patterns? Explain.
3. Label the 5’ and 3’ ends of your molecule. Draw an arrow in the 5’—> 3’ direction on each strand.
04/13/2023 10
04/13/2023 11
ERWIN CHARGAFFBorn: 11-Aug-1905Birthplace: Chernovtsy, UkraineDied: 20-Jun-2002Location of death: New York CityCause of death: unspecified
Gender: MaleRace or Ethnicity: WhiteSexual orientation: StraightOccupation: Biologist, ChemistNationality: United StatesExecutive summary: Biochemist at Columbia University
04/13/2023 12
ERWIN CHARGAFFBorn: 11-Aug-1905Birthplace: Chernovtsy, UkraineDied: 20-Jun-2002Location of death: New York CityCause of death: unspecified
Gender: MaleRace or Ethnicity: WhiteSexual orientation: StraightOccupation: Biologist, ChemistNationality: United StatesExecutive summary: Biochemist at Columbia University
04/13/2023 13
A T G C
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Drosophila melanogaster
27.3 27.6 22.5 22.5
Zea mays 25.6 25.3 24.5 24.6
Neurospora crassa 23 23.3 27.1 26.6
Escherichia coli 24.6 24.3 25.5 25.6
Bacillus subtilis 28.4 29 21 21.6
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