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DNA

DNA. Deoxyribose Nucleic Acid. DNA…your book of life. http://www.cbsnews.com/8301-3445_162-57556650/a-need-to-know-the-worst-news-you-will-ever-hear/ Would you want to know?. The information stored on DNA from one human cell. Equals the amount of information in 1000, 500 page books.

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DNA

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  1. DNA Deoxyribose Nucleic Acid

  2. DNA…your book of life • http://www.cbsnews.com/8301-3445_162-57556650/a-need-to-know-the-worst-news-you-will-ever-hear/ • Would you want to know?

  3. The information stored on DNA from one human cell Equals the amount of information in 1000, 500 page books.

  4. 2 Main Functions of DNA • Carry the Code of Life-instruction manual for every living organism • 2. Blueprint for making proteins

  5. The structure was discovered in 1953 by two scientists: James Watson & Francis Crick

  6. Double Helix=shape of DNA

  7. Nucleotidesare the basic structural units of DNA and consist of 3 things: • Phosphate 2. Sugar (Deoxyribose) • Nitrogen Base (Can be a Pyrimidine or Purine)

  8. Nitrogen Bases Purine = Adenine (A), Guanine (G) Pyrimidine =Thymine (T), Cytosine (C) *All 3 have a Y Watson’s Discovery Watson's Ideas

  9. Base Pairing A-T C-G Nitrogen Bases attached to Deoxyribose (sugar) http://www.dnalc.org/resources/3d/21-chargaff-ratios.html Chagraff’s Rule

  10. Hydrogen bonds are the glue that hold everything together Sugar – Deoxyribose Phosphate Groups (spacer) Nitrogen Bases – Code of Life in ATCG Thymine always pairs with Adenine Guanine always pairs with Cytosine GC AT CG T A GC G C

  11. What makes up the “Backbone” of the DNA Double Helix? Which structure in the backbone is directly attached to the Nitrogen bases? What are the “spacers” between each step? Why were Mike&Ikes a good example for the purines? Why were Skittles a good example for the pyrimidines?

  12. DNA must replicate or make a copy of itself before a cell can divide. • Play DNA Replication video from PBS in home folder • Remember Interphase?

  13. DNA Replication – DNA makes a copy of itself Important during meiosis & mitosis because it makes sure the daughter cells have the appropriate number of chromosomes. DNAi animation If the original strand of DNA is AATTGGCC The complementary strand of DNA is TTAACCGG

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