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Nucleic acids

Nucleic acids. Nucleic Acids. _____________ _____________. proteins. DNA. Nucleic Acids. Function: _______________________ ________________________ genes blueprint for building proteins DNA  RNA  proteins ________________________ blueprint for new cells

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Nucleic acids

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  1. Nucleic acids

  2. Nucleic Acids __________________________

  3. proteins DNA Nucleic Acids • Function: • _______________________ • ________________________ • genes • blueprint for building proteins • DNA  RNA  proteins • ________________________ • blueprint for new cells • blueprint for next generation

  4. T G A C T A C A G G A T C

  5. Nucleic Acids • Examples: • ________ (ribonucleic acid) • single helix • ________ (deoxyribonucleic acid) • double helix • Structure: • monomers = ________________ DNA RNA

  6. Nucleotides • 3 parts • _____________ (C-N ring) • _____________(5C) • ribose in RNA • deoxyribose in DNA • _____________________ Nitrogen baseI’m the A,T,C,G or Upart! Are nucleic acidscharged molecules?

  7. Types of nucleotides Purine = AG Pure silver! • 2 types of nucleotides • different nitrogen bases • _________________ • double ring N base • ________________ • ________________ • _________________ • single ring N base • ________________ • ________________ • ________________

  8. Nucleic polymer • Backbone • sugar to PO4 bond • _______________________ • new base added to sugar of previous base • polymer grows in one direction • N bases hang off the sugar-phosphate backbone Dangling bases?Why is this important?

  9. Pairing of nucleotides • Nucleotides bond between DNA strands • H bonds • purine :: pyrimidine • __________ • 2 H bonds • __________ • 3 H bonds Matching bases?Why is this important?

  10. DNA molecule • Double helix • ____________ between bases join the 2 strands • A :: T • C :: G H bonds?Why is this important?

  11. Copying DNA • Replication • ______________________________________________ • have one, can build other • have one, can rebuild the whole Matching halves?Why is this a good system?

  12. When does a cell copy DNA? • When in the life of a cell does DNA have to be copied? • ____________________ • ________________ • ____________________ • ________________

  13. DNA replication “It has not escaped our notice that the specific pairing we have postulated immediately suggests a possible copying mechanism for the genetic material.” James Watson Francis Crick 1953

  14. 1953 | 1962 Watson and Crick … and others…

  15. 1953 | 1962 Maurice Wilkins… and…

  16. Rosalind Franklin (1920-1958)

  17. Interesting note… • Ratio of A-T::G-C affects stability of DNA molecule • 2 H bonds vs. 3 H bonds • biotech procedures • more G-C = need higher T° to separate strands • high T° organisms • many G-C • parasites • many A-T (don’t know why)

  18. Another interesting note… • ATPAdenosine triphosphate • modified nucleotide • adenine (AMP) + Pi + Pi + +

  19. HELIXHELIX

  20. Macromolecule Review

  21. Carbohydrates • Structure / monomer • monosaccharide • Function • energy • raw materials • energy storage • structural compounds • Examples • glucose, starch, cellulose, glycogen glycosidic bond

  22. Lipids • Structure / building block • glycerol, fatty acid, cholesterol, H-C chains • Function • energy storage • membranes • hormones • Examples • fat, phospholipids, steroids ester bond (in a fat)

  23. Proteins • Structure / monomer • amino acids • levels of structure • Function • enzymes u defense • transport u structure • signals u receptors • Examples • digestive enzymes, membrane channels, insulin hormone, actin peptide bond

  24. Nucleic acids • Structure / monomer • nucleotide • Function • information storage & transfer • Examples • DNA, RNA phosphodiester bond

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