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

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