Lect3_DNA

Lect3_DNA - Theoretical fact level DNA Another example of how Structure determines Function Day#3 Bis2A Confidence that an idea is right Facts may

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1 DNA: Another example of how Structure determines Function Day #3, Bis2A Accumulation of experimental evidence (failed attempts to falsify) Confidence that an idea is right “Theoretical fact level” ‘Facts’ may be fiction. Then what is left of your education? What if you learned not only ‘facts’, but how we ‘know’ what we do, and thus how to evaluate information? Science works entirely with information that has some probability of being right (and some probability of being wrong). There’s no concrete answer to a complex question Even the answers to ‘simple’ questions may be uncertain. Some ideas are on more solid footing than others –The closer something becomes to certainty (becoming a “fact”) the more boring it gets. It’s the insecurity that makes the process of scientific discovery exciting! Science as a “Precise, Predictive, and Reliable” way of knowing the world. Today’s Goals 1. Understand the structure of DNA and how it relates to: – A. Information storage – B. Stability – C. Replication • 2. Understand how DNA’s antiparallel structure causes formation of leading and lagging strands during replication Nucleic Acids • DNA (deoxyribonucleic acid) and RNA (ribonucleic acid) are both long POLYMERS built of a repeating MONOMER called a nucleotide Polymer monomer • Draw a nucleotide using these symbols = base (A, T, C or G) = 5-carbon sugar = phosphate group
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2 • Which nucleotide is drawn correctly? A B C D • Which nucleotide is drawn correctly? A B C At what level of Bloom’s is this question? A. Information B. Comprehension C. Application • Label carbons 3 and 5 in the sugar of this nucleotide • Which nucleotide is labeled correctly? A
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This note was uploaded on 03/08/2011 for the course BIS 2A taught by Professor Grossberg during the Fall '08 term at UC Davis.

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Lect3_DNA - Theoretical fact level DNA Another example of how Structure determines Function Day#3 Bis2A Confidence that an idea is right Facts may

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