THURSDAY 2-12-15 LEARNING OBJECTIVE: WHAT ARE GENES? ENTRY TASK: WHAT DO YOU KNOW ABOUT: GENES DNA...
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Transcript of THURSDAY 2-12-15 LEARNING OBJECTIVE: WHAT ARE GENES? ENTRY TASK: WHAT DO YOU KNOW ABOUT: GENES DNA...
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THURSDAY 2-12-15 LEARNING OBJECTIVE:
WHAT ARE GENES?
ENTRY TASK:
• WHAT DO YOU KNOW ABOUT:• GENES
• DNA
• GENE THERAPY
• CANCER
• CYSTIC FIBROSIS
• PROTEIN
HOW ARE THESE TERMS RELATED?
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PLAN OF THE DAY
• INTRO TO GENETICS
• DNA AND CELL DIVISION UNIT
• 10 YEARS OF GENOME RESEARCH AND GENETIC DISEASES
•HTTPS://WWW.YOUTUBE.COM/WATCH?V=FGQ-XOYORWY•60:00
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FRIDAY 2-13-15
LEARNING OBJECTIVE:
STRUCTURE OF THE DNA MOLECULE
ENTRY TASK:
• WHAT ARE THE FOUR BASES PRESENT IN THE DNA MOLECULE? LOOK AT PAGE 345 – FIGURE 12-5 AND TRANSFER THE DIAGRAM TO YOUR JOURNAL
1ST ELODEA
4TH HEARTS
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PLAN OF THE DAY
• CHECK YOUR TEST RESULTS FOR CHAPS. 8 & 9
• INTRO TO GENETICS
• DNA AND CELL DIVISION UNIT
• 10 YEARS OF GENOME RESEARCH AND GENETIC DISEASES
•HTTPS://WWW.YOUTUBE.COM/WATCH?V=FGQ-XOYORWY•60:00
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TUESDAY 2-17-15
LEARNING OBJECTIVE:
STRUCTURE OF THE DNA MOLECULE
ENTRY TASK:
WHAT WOULD BE THE MATCHING DNA STRAND THAT WOULD PAIR WITH THIS SEQUENCE OF BASES?
A T A A T T G C G G A T T C
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PLAN OF THE DAY
• DNA STRUCTURE AND FUNCTION
• CRASH COURSE ON DNA
• BRAINSTORM WITH PARTNER ON WHAT MATERIALS TO BRING FOR DNA MODEL
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•HTTPS://WWW.YOUTUBE.COM/WATCH?V=RW7XU7DURG4 53:00
•HTTPS://WWW.GOOGLE.COM/?GWS_RD=SSL#Q=DNA+CRASH+COURSE 13:00•HTTPS://WWW.YOUTUBE.COM/WATCH?V=5QSRMEIWSUC•8:00 REPLICATION WITH THE AMOEBA SISTERS
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The basic unit of the DNA molecule is called:
NUCLEOTIDE
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A NUCLEOTIDE in DNA has three parts: A ring-shaped sugar called deoxyribose A phosphate group A nitrogenous base (single or double ring of
carbon and nitrogen atoms)
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Nucleotide monomers join together by covalent bonds between the sugar of one nucleotide and the phosphate of the next, forming a sugar-phosphate backbone.
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Nitrogenous Bases
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The bases pair up (A-T & G-C) forming the DOUBLE HELIX first described by Watson and Crick
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Watson, Crick and Franklin
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Various ways to model DNA structure
•http://www.umass.edu/molvis/tutorials/dna/dnapairs.htm manipulate DNA
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WEDNESDAY 2-18-15
LEARNING OBJECTIVE:
STRUCTURE OF THE DNA MOLECULE
ENTRY TASK:
DNA GOES THROUGH THE PROCESS OF REPLICATION (DUPLICATION) IN OUR CELLS. WHY DO YOU THINK THIS PROCESS IS NECESSARY?
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PLAN OF THE DAY
• WORK WITH YOURSELF OR WITH YOUR PARTNER TO BUILD YOUR 3D DNA MODEL
• IF YOU DID NOT BRING MATERIALS FOR YOUR OWN MODEL, GET THE HANDOUT TO DO THE FLAT DNA MODEL
• IF FINISHED, READ AND TAKE NOTES OF SECTION 12.3 (PP 350-351) IN YOUR NOTEBOOK (DUE FRIDAY 19)
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DNA MODELS
PAPER MODELS
• HTTP://WWW.GOV.MB.CA/CONSERVATION/SUSTAIN/DNADONE.PDF
• HTTP://WWW.MYSCIENCEBOX.ORG/BOOK/EXPORT/HTML/347
• HTTP://WWW.ALDER.K12.OH.US/USERFILES/251/CLASSES/2831/DNAMODELPARTSFORYOURPRESENTATION.PDF
ORIGAMI DNA
• HTTPS://WWW.YOUTUBE.COM/WATCH?V=LEJF0F1JTUQ
• HTTP://WWW.DNAI.ORG/TEACHERGUIDE/GUIDE.HTML
• HTTP://WWW.DNAI.ORG/TEACHERGUIDE/PDF/ORI_COLOR.PDF
• HTTP://WWW.DNAI.ORG/TEACHERGUIDE/PDF/ORIGAMI_INST.PDF
• HTTP://WWW.DNAI.ORG/TEACHERGUIDE/PDF/ORI_BW.PDF
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THURSDAY 2-19-15
LEARNING OBJECTIVE:
STRUCTURE OF THE DNA MOLECULE
ENTRY TASK:
GET YOUR DNA MODELS READY. IN 20 MINUTES WE WILL START PRESENTATIONS
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PLAN OF THE DAY
• FINISH LAST TOUCHES OF YOUR DNA MODEL AND PRESENT IT TO YOUR CLASSMATES
• IF FINISHED, READ AND TAKE NOTES OF SECTION 12.3 (PP 350-351) IN YOUR NOTEBOOK (DUE FRIDAY 20)
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FRIDAY 2-20-15
LEARNING OBJECTIVE:
DNA REPLICATION PROCESS
ENTRY TASK:
NAME TWO OF THE ENZYMES INVOLVED IN THE DNA REPLICATION PROCESS AND THEIR FUNCTION
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PLAN OF THE DAY
• LAST PRESENTATIONS OF DNA MODEL
• REPLICATION NOTES
• REPLICATION PRACTICE WITH WHITE BOARD
• CREATING A DNA REPLICATION SKIT WITH THE ENTIRE CLASS
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Why does DNA need to be replicated?
Growth – new cells - reproduction
How does this process happen?
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REPLICATION IN 3 STEPS DNA
replication results in two new DNA molecules, each containing one new strand (yellow) and one original strand (blue)
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Weak bonds Hydrogen bonds Comes apart
easily Comes together
easily
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Overview of DNA replication
DNA separates Complementary
nucleotides are linked along separated strands
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initiate
Initiator protein guides unzipper protein (helicase) to correct position on DNA
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untwister
Untwister (topoisomerase) unwinds the DNA double helix in advance of the unzipper
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• Unzipper separates DNA strands, breaking weak bonds between the nucleotides
unzip
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assemble
• Builders (polymerases) assemble new DNA strand by joining nucleotides to their matching complements on the exposed strands
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straightners
Straighteners (single-strand DNA binding proteins) keep single strand of DNA from tangling
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Phosphate provides energy
• Phosphate bond energy from the new nucleotides is used to make the new bonds
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Leading vs. Lagging strand
Leading (top) strand is built continuously as the builder follows behind the unzipper, but the Lagging (lower) strand builds in the opposite direction
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Lagging strand
Lagging (lower) builder makes a loop with the DNA strand and builds in opposite direction
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Lagging strand
Built in small sections
Sections linked by enzyme ligase
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Repairs of DNA
Erasers (Repair Nuclease): find poorly matched or damaged nucleotides and cut them out
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Repairs of DNA
Builders (Polymerase): fill gaps using other DNA strand as a guide
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Repairs of DNA
Stitchers (Ligase): uses ATP to restore continuity of backbone of repaired strand
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Big picture of DNA replication
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Replication review
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REPLICATION IN 3 STEPS DNA
replication results in two DNA molecules, each with one new strand (yellow) and one old strand (blue)
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DNA replication animations
http://www.youtube.com/watch?v=4jtmOZaIvS0
http://www.youtube.com/watch?v=gW3qZF9cLIA
http://www.youtube.com/watch?v=oNW_ykH3AvA
http://www.youtube.com/watch?v=hC_8y8fNkCw
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TED talk – DNA replication – Chromosomes- malaria http://www.youtube.com/watch?v=dMPX
u6GF18M Timing of replication article: http://
hms.harvard.edu/news/marching-our-own-sequences