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D.N.A.

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  1. D.N.A. DeoxyriboNucleic Acid A molecule that contains our genetic information Is found in the nucleus of almost all cells wound up into chromosomes.

  2. DeoxyriboNucleic Acid Double Helix (Twisted Ladder) Double stranded Made of Nucleotides: Sugar, Phosphate, Base Has 4 nitrogen bases: Adenine, Guanine, Thymine, Cytosine Combination of these bases (order) is what makes up our traits

  3. Nucleotides

  4. NUCLEOTIDES

  5. Base Pair

  6. Base Pair • Complete the DNA strand T A C G C C C G T T A T C A T A A ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Hydrogen Bonds!!!

  7. Purines (Adenine, Guanine) • Pyrimidines (Thymine, Cytosine)

  8. Replication • Why Replicate (copy)? • STEPS TO COPY DNA: • DNA UNWINDS • DNA UNZIPS • BASE PAIRS ARE ADDED TO BOTH STRANDS • 2 NEW DNA MOLECULES

  9. Replication

  10. DNA molecule http://www.dnai.org/index.html Base Pairing http://gslc.genetics.utah.edu/units/basics/ Replication http://www.pbs.org/wgbh/aso/tryit/dna/index-nojs.html

  11. RNA • Ribonucleic acid • RNA is a messenger for DNA. • RNA takes the genetic information from DNA and takes it to the ribosomes where it makes the proteins

  12. 3 differences between RNA and DNA 1. RNA = ribose (does have oxygen) DNA – deoxyribose (does not have oxygen) 2. RNA has a single strand DNA has a double strand 3. RNA has uracil as a base instead of Thymine like DNA has

  13. RNA • 3 types • messenger RNA – takes info from nucleus to ribosome • transfer RNA – transfers amino acids to ribosome • Ribosomal RNA – makes up ribosomes

  14. RNA

  15. Protein Synthesis • http://www.pbs.org/wgbh/aso/tryit/dna/index-nojs.html