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Published byNathaniel Barnett Modified over 9 years ago
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DNA Structure/Function
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RECALL … 4 classes of macromolecules –Carbohydrates –Lipids –Proteins –NUCLEIC ACIDS!!! –Subunit: NUCLEOTIDES
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Nucleic Acid Examples DNA – deoxyriboNUCLEIC ACID (de – without, oxy – oxygen, ribo – ribose sugar) Store and pass genetic information Code for proteins RNA – riboNUCLEIC ACID Protein synthesis Subunits of DNA/RNA: nucleotides
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DNA Very longVery long thin molecule made up of linked nucleotides Double stranded helix –Twisted ladder Determines traits of EVERY LIVING ORGANISM
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Nucleotide Structure 3 parts –Sugar (deoxyribose or ribose) –Phosphate (P with oxygens attached) –Nitrogen base Adenine Thymine Guanine Cytosine
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Nucleotide Structure 2 classes of nucleotides –Purines Adenine Guanine –Pyrimidines Thymine Cytosine Purines are PURE – like A n G els P y rimidines – Y like Th y mine and C y tosine
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Nitrogen Base Pairing Adenine Thymine 4-eva Guanine Cytosine
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Nitrogen Base Pairing Adenine Thymine Guanine Cytosine = Hydrogen Bond
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Nitrogen Base Pairing Adenine Thymine CytosineGuanine ThymineAdenine CytosineGuanine AdenineThymine Guanine Cytosine = Hydrogen Bond
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Nitrogen Base Pairing Adenine Thymine CytosineGuanine ThymineAdenine CytosineGuanine AdenineThymine Guanine Cytosine Sugar + Phosphate backbone
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Compl-e-ment – complement –To complete, finish, or fill something up NOT this kind… Compl-i-ment - compliment –“My students are the best in the school!”
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What is the COMPLEMENTARY DNA STRAND? EXAMPLE 1 3’ end 5’ end ATTGACCATTGATAGCCGAATA TAACTGGTAACTATCGGCTTAT EXAMPLE 2 5’ end 3’ end TCTTCGGAACATTAGTCGAGGC AGAAGCCTTGTAATCAGCTCCG
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Now you try! Find the complementary DNA strand! 1.TAG ACC CAG CCC 2.CCG CAC CTG TTA AAA
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