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DNA ,[object Object],[object Object],[object Object],[object Object],[object Object],jj
History ,[object Object],[object Object],X-ray photograph taken by Roseland Franklin
Structure of DNA ,[object Object],[object Object],Millions of these bases combine to form DNA! ,[object Object],[object Object],[object Object],base sugar P
DNA structure – nitrogen bases ,[object Object],[object Object],[object Object],A sugar P T sugar P ,[object Object],C sugar P G sugar P ,[object Object]
What Does DNA Stand For? D =  Deoxyribose sugar NA =  Nucleic Acid Deoxyribonucleic acid
DNA structure – nitrogen bases Millions Base pairs long! Twists to double helix shape
The double helix looks like a double twisted ladder This is further twisted and packed into chromosomes in the nucleus.
Draw your own DNA strand ,[object Object],[object Object],[object Object],[object Object],A s P T s P C s P G s P
DNA Replication                                                                                             DNA before replication The 2 strands unzip, exposing the nucleotides The free “floating” nucleotides pair with the exposed nucleotides, forming 2 identical chains.
Replicate your own DNA strand ,[object Object],[object Object],[object Object],A s P C s P T s P G s P
 
 

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Dna

  • 1.
  • 2.
  • 3.
  • 4.
  • 5. What Does DNA Stand For? D = Deoxyribose sugar NA = Nucleic Acid Deoxyribonucleic acid
  • 6. DNA structure – nitrogen bases Millions Base pairs long! Twists to double helix shape
  • 7. The double helix looks like a double twisted ladder This is further twisted and packed into chromosomes in the nucleus.
  • 8.
  • 9. DNA Replication                                                                                             DNA before replication The 2 strands unzip, exposing the nucleotides The free “floating” nucleotides pair with the exposed nucleotides, forming 2 identical chains.
  • 10.
  • 11.  
  • 12.