131106outline8 - Biol. 1311 9/15/06 Basics of nucleic acid...

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Biol. 1311 – 9/15/06 – Basics of nucleic acid coding of protein sequence Nucleic acids as information carriers All evolutionary change incorporates a change in nucleic acid sequences A very brief review of nucleic acids (Fig 4.1) Polymerization looks similar to previous chemistries (Fig 4.2) But not identical (fig 14.9) Something more than just H 2 O comes off There is more than basic information in those few letters (fig 15.8) Theses are RNA bases – how do you know? The permanent repository is DNA (fig 15.3) Information is store twice at the same time because of base-pairing (fig 4.9b) From any one strand of DNA the other is prescribed (fig 4.10) Notice that the 2 strands are oriented in opposite directions We will come back to the details of this structure later (Fig. 4.11) Your book calls this a secondary structure – is it? Helix can be unwrapped and new copies made (Fig 4.12) Contrast to RNA which functions as a single linear sequence (fig 4.13) But it can form 3D structures
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This note was uploaded on 01/24/2010 for the course BIO 1311 taught by Professor Shinkle during the Fall '06 term at Trinity University.

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131106outline8 - Biol. 1311 9/15/06 Basics of nucleic acid...

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