2. Regents Biology 2006-2007 Nucleic acids: ______________________

3. Regents Biology Nucleic Acids Examples  ____________  DeoxyriboNucleic Acid  ____________  RiboNucleic Acid

4. Regents Biology DNA Nucleic Acids  Function:  genetic material  _________________________  genes  blueprint for building proteins DNA  RNA  proteins  _________________________  blueprint for new cells  blueprint for next generation proteins

5. Regents Biology A A A A T C G C G T G C T Genes (DNA) are needed to run bodies every day … to make you and me … to make new cells … to make babies!

6. Regents Biology Nucleic acids  Building block = _________________ nucleotide – nucleotide – nucleotide – nucleotide  _______________________  different nitrogen bases  ____________________ phosphate sugar N base Nitrogen bases I’m the A,T,C,G or U part!

7. Regents Biology Nucleotide chains  Nucleic acids  nucleotides chained into a polymer  _________________  ________________  _________________  ________________ phosphate sugar N base phosphate sugar N base phosphate sugar N base phosphate sugar N base RNA

8. Regents Biology DNA  Double strand twists into a double helix  _______________ between nitrogen bases join the 2 strands  ___________________  A :: T  ___________________  C :: G  the two strands can easily separate when our cells need to make copies of it _____________

9. Regents Biology Copying DNA  _____________________  copy DNA  2 strands of DNA helix are _______________________  they are matching  have one, can build other  have one, can rebuild the whole

10. Regents Biology  Copying DNA  pairing of the bases allows each strand to serve as a pattern for a new strand Newly copied strands of DNA DNA replication

11. Regents Biology Watson and Crick … and others… 1953 | 1962

12. Regents Biology HELIXHELIX Let’s build some DNA!