lecture 10

lecture 10 - Lecture #10- DNA and Chromosome Structure (ch...

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Lecture #10- DNA and Chromosome Structure (ch 8 p. 178-193) I. Nucleic Acid (DNA and RNA) Structure A. Molecules and Chemical Bonds 1. Molecules are made up of atoms (elements) MOST common IN BIOLOGY system ARE CHON 2. Atoms are held together in molecules via covalent bonds. (figure 8.4a) FOR FRO SHARING OF ELECTRONS BETWEEN ATOS> ARE STRONG BONDS BREAKING USUALY INVOLES A CHEICAL REACTION> REPRESENTED AS A SOLID LINE 3. Hydrogen bonds form weak, transient interactions between atoms with partial, opposite charge (figure 8.4b). FOR BETWEEN POSITIVE AND NEGATIVE IN AND BETWEEN POLAR Molecules DIPOLE _ PARTIAL CHARGE VERY IMPORTANT IN BIOLOGICAL SYSTEMS STABILIZE STRUCTURE OF DNA AND PROTEINS REPRESENTED AS DASHED LINES B. Nucleic Acids are made up of nucleotides 1. Two kinds of nucleic acids DNA _ DEOXYRIBONUCLEIC ACID RNA RIBONUCLEIC ACID MADE UP OF NUCLEOTIDES 2. Components of Nucleotides (figures 8.5, 8.6) - NITROGEN CONTAINING BASE -PURINES – ADENINE (A) GUANINE (G) -PYRIIDINES – CYTOSINE (C) THYINE ( T< DNA ONLY)
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This note was uploaded on 04/09/2008 for the course BME 80H taught by Professor Rothwell during the Winter '07 term at UCSC.

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lecture 10 - Lecture #10- DNA and Chromosome Structure (ch...

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