1.Go to wiki page – kkramer.pbwiki.com 2.Click on “Biology” in right sidebar 3.Click on “Chapter 12.ppt” on bottom left of table 4.Click on “open” in window.

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1.Go to wiki page – kkramer.pbwiki.com 2.Click on “Biology” in right sidebar 3.Click on “Chapter 12.ppt” on bottom left of table 4.Click on “open” in window that appears to open the PowerPoint 5.Go to “Slide Show” on top menu bar and click on “view show” to view the Power Point

Chapter 12 DNA & RNA

Pg 291 & 294 The Components & Structure of DNA –Review Monomer = nucleotides Polymer = DNA –DNA chain Phosphate Sugar Base (4) backbone

Pg 291 & 294 The Components & Structure of DNA –Bases 4 kinds –Adenine –Thymine –Cytosine –Guanine 2 types –Purines –Pyrimidines

Single Strand of DNA

12.2 DNA Replication Replication  “copy” –Use one side as a template to make a compliment –Helicase “unzips” nucleotide pairs –DNA Polymerase adds nucleotide pairs to make new strand

5 Quick Quiz

Activity

DNA double helix Nucleosomes w/ histones Coiled nucleosomes (supercoils) Loops of coiled nucleosomes Coiled loops of coiled nucleosomes Chromosome

12.2 DNA Replication Coiling –DNA in a nucleus = 30ft. fishing line in a pea –Wrap around histones for protection

12.3 RNA & Protein Synthesis DNA code = order of amino acids to make protein DNA code  protein process? –Transcription = transcribe = to write/copy –Translation = translate = convert from one form to another

12.3 RNA & Protein Synthesis RNA –3 types mRNA (messenger) rRNA (ribosomal) tRNA (transfer)

12.3 RNA & Protein Synthesis Transcription –RNA Polymerase “unzips” DNA –Single strand of DNA is read & copied to make RNA –Differences btw DNA & RNA Double vs. single stranded Thymine vs uracil nucleotides –DNA code to start and stop Promoter / terminus AUG / UAA, UAG, UGA

12.3 RNA & Protein Synthesis

mRNA –Editing Exons – kept Introns – cut out EIEIE EEE

12.3 RNA & Protein Synthesis Translation –Finished mRNA leaves nucleus –Every 3 bases = codon

12.3 RNA & Protein Synthesis Translation –Each codon codes for one amino acid –tRNA matches codon and brings amino acid w/ it (anticodon) –Amino acids attach forming a protein

Activity

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