Dna & rna

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Dna & rna

  1. 1. DNA "The Blueprint of Life"
  2. 3. The goal of DNA and RNA <ul><li>DNA and RNA exist to act as the code for all the proteins that are made in your body. </li></ul><ul><li>Chemical reactions run according to these proteins. We’ve looked at proteins in the following reactions: </li></ul><ul><ul><li>photosynthesis & cellular respiration </li></ul></ul><ul><ul><li>mitosis and meiosis </li></ul></ul><ul><li>Proteins also determine your physical traits (hair color, eye color) and how your body reacts to the environment. </li></ul><ul><li>Basically, proteins do everything and DNA is the code for how to build the proteins. </li></ul>
  3. 4. DNA stands for...       D eoxyribo N ucleic A cid
  4. 5. DNA FACTS <ul><ul><li>established by James Watso n and Francis Crick  </li></ul></ul><ul><li>  </li></ul><ul><li>  </li></ul><ul><li>  </li></ul><ul><li>  </li></ul><ul><li>  </li></ul><ul><ul><li>Shape of a double helix </li></ul></ul>
  5. 6. <ul><ul><li>codes for your genes   (traits) </li></ul></ul><ul><ul><li>made of repeating subunits called nucleotides </li></ul></ul>
  6. 7. What is a nucleotide? <ul><li>Has three parts:    </li></ul><ul><li>PHOSPHATE </li></ul><ul><li>DEOXYRIBOSE (sugar) </li></ul><ul><li>BASE  (A,T,G,C) </li></ul>
  7. 8. Base-Pair Rule <ul><li>Adenine <==> Thymine </li></ul><ul><li>Guanine <==> Cytosine </li></ul>The sides of the DNA ladder are phosphate & sugar held together by  hydrogen bonds
  8. 9. Base Pair Rule <ul><li>One side:     A   T   A      T   C   A      T   G   C      G   G   G </li></ul><ul><li>Other side: </li></ul>
  9. 10. Base Pair Rule <ul><li>One side:     A   T   A      T   C   A      T   G   C      G   G   G </li></ul><ul><li>Other side: T A T A G T A C G C C C </li></ul>
  10. 13. How the Code Works <ul><li>The combination of A,T,G,C determines what traits you might have, for ex. </li></ul><ul><li>C A T C A T   =  purple hair </li></ul><ul><li>T A C T A C  =  yellow hair </li></ul>
  11. 14. Think of the bases of DNA like letters. Letters form words.... Words form sentences....                 *endless                combinations
  12. 15. RNA carries the &quot;message,&quot; or DNA code, to the ribosomes, where proteins are made
  13. 16. RNA - the messenger   *single strand *ribose sugar *contains no thymine, uracil instead *follows base pair rule, except adenine binds with uracil instead of thymine DNA:   A  T  A   G  C  G RNA:  

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