Atcheson dn areplicationmodel

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Atcheson dn areplicationmodel

  1. 1. DNA Replication Mackenzie Atcheson
  2. 2. DNA Replication begins in the Origin of Replication. This is Called the Replication Fort.
  3. 3. Adenine 5’ 5’
  4. 4. Adenine 5’ Thymine 5’
  5. 5. Adenine 5’ Thymine Cytosine 5’
  6. 6. Adenine 5’ Thymine Cytosine Guanine 5’
  7. 7. Adenine 5’ 3’ Thymine Cytosine Guanine 3’ 5’
  8. 8. Adenine 5’ 3’ A Thymine Adenine A purine base, that is the constituent involved in base pairing with thymine in DNA and with uracil in RNA. A Cytosine Guanine 3’ A 5’
  9. 9. Adenine 5’ A T 3’ Thymine T A A T Thymine a pyrimidine base that is one of the four bases coding genetic information in the polynucleotide chain of DNA Cytosine Guanine 3’ 5’
  10. 10. Adenine 5’ A T 3’ Thymine Cytosine a pyrimidine base that codes genetic information in the polynucleotide chain of DNA or RNA C T A Cytosine C Guanine 3’ A T 5’
  11. 11. Adenine 5’ A T 3’ Thymine G T Guanine a purine base that codes genetic information in the polynucleotide chain of DNA or RNA C A Cytosine C G Guanine 3’ A T 5’
  12. 12. Adenine 5’ A T 3’ Thymine G T DNA Polymerase Reads DNA In The 3’-5’ Direction. C A Cytosine C G Guanine 3’ A T 5’
  13. 13. 5’ A T G C T A C G A T Helicase The first step of DNA replication is unwinding or unzipping the DNA. Helicase is the enzyme that unzips the DNA. 5’ Hydrogen Bonds between the base pairs are broken.
  14. 14. 5’ A T G C T A C G A A molecule of DNA Polymerase attaches to one strand of the DNA and moves in the 3’ to 5’ direction. T 5’
  15. 15. 5’ A T G C T A C G A A molecule of DNA Polymerase attaches to one strand of the DNA and moves in the 3’ to 5’ direction. T 5’ This is used as a template for assembling a leading strand of nucleotides and reforming the double helix.
  16. 16. 5’ A T G C T A C G A DNA synthesis can only occur in a 5’ to 3’ direction. T 5’
  17. 17. 5’ A T G C T A C G A DNA synthesis can only occur in a 5’ to 3’ direction. T 5’ Another form of DNA polymerase binds to the other strand.
  18. 18. 5’ A T G C T A C G A This molecule must synthesize discontinuous segments of polynucleotides T 5’
  19. 19. 5’ A T G C T A C G A This molecule must synthesize discontinuous segments of polynucleotides T 5’ These are called Okazaki Fragments.
  20. 20. There are now two identical copies of the DNA. Sugar Phosphate Backbone BASE PAIRS Thymine—Adenine Guanine—Cytosine
  21. 21. DNA Replication occurs in the “S” phase of the interphase in mitosis. Sugar Phosphate Backbone BASE PAIRS Thymine—Adenine Guanine—Cytosine
  22. 22. THE END

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