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.
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
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!!!
Purines (Adenine, Guanine) • Pyrimidines (Thymine, Cytosine)
Replication • Why Replicate (copy)? • STEPS TO COPY DNA: • DNA UNWINDS • DNA UNZIPS • BASE PAIRS ARE ADDED TO BOTH STRANDS • 2 NEW DNA MOLECULES
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
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
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
RNA • 3 types • messenger RNA – takes info from nucleus to ribosome • transfer RNA – transfers amino acids to ribosome • Ribosomal RNA – makes up ribosomes
Protein Synthesis • http://www.pbs.org/wgbh/aso/tryit/dna/index-nojs.html