lecture 9-18-09 nucleic acids

lecture 9-18-09 nucleic acids - Chapter 5(pp.86-90 For...

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Unformatted text preview: Chapter 5 (pp.86-90) For NUCLEIC ACIDS Learning objectives: • Describe the: - elemental composition , - molecular structure/subunits- functions • Describe the building-block molecules, structure, and biological roles of DNA • Distinguish between: a. ribose and deoxyribose b. nucleotide and nucleoside c. pyrimidines and purines d. DNA’s covalent and hydrogen bonds • Explain the 5’ to 3’ polarity of a nucleic acid polymer Additonal terms to know include… alpha helix, antiparallel, nitrogenous base, phosphodiester linkage, paired bases, complimentary strands… Nucleic Acids • Composed of elements: C, H, O, N, & P • Monomer subunits: Nucleotides- pyrimidines- purines • Polymers - Two major kinds: – Deoxyribonucleic acid ( DNA ) – Ribonucleic acid ( RNA ) • Functions * : Storage of genetic information Protein synthesis * [Additional roles of related nucleosides/nucleotides include energy transfers (ATP/ADP), signal transduction (cAMP), & metabolic co- enzymes (NAD/FAD)] • Nucleo sides- Are nitrogenous bases + a pentose sugar (c) Nucleoside components Figure 5.26 CH CH Uracil (in RNA) U Ribose (in RNA) Nitrogenous bases Pyrimidines C N N C O H NH 2 CH CH O C N H CH HN C O C CH 3 N...
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This note was uploaded on 01/20/2010 for the course BIO 50415 taught by Professor Batterton during the Fall '09 term at University of Texas.

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lecture 9-18-09 nucleic acids - Chapter 5(pp.86-90 For...

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