Bio Chapter_5-3 - Chapter 5-3 Nucleic Acids Nucleic Acids Nucleic acids store and transmit hereditary information Nucleic acid monomers are called

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Chapter 5-3 : Nucleic Acids Nucleic Acids Nucleic acids store and transmit hereditary information Nucleic acid monomers are called nucleotides Nucleic acid polymers are called polynucleotides There are two types of Nucleic Acids: Deoxyribonucleic acids (DNA) Ribonucleic acids (RNA) Structure of Nucleic Acids Nucleotides are composed of 3 parts: 1 phosphate group 1 five carbon sugar 1 nitrogenous base 5 carbon sugar RNA – uses a ribose sugar DNA – the sugar is deoxyribose because it is missing one oxygen (de – oxy) Nitrogenous Base Nitrogen tends to take up H + from the environment, which is why they are called bases 2 types of nitrogenous bases: Pyrimidines – 6 membered ring of carbon with nitrogen atoms Purines – a 6 membered ring and a 5 membered ring are fused together Formation of Polynucleotides Adjacent nucleotides are joined by a phosphodiester linkage Phosphodiester – bond between a phosphate group and the –OH group on the adjacent
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This note was uploaded on 09/18/2011 for the course BIOL 1301 taught by Professor Harden during the Spring '11 term at Lone Star College.

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Bio Chapter_5-3 - Chapter 5-3 Nucleic Acids Nucleic Acids Nucleic acids store and transmit hereditary information Nucleic acid monomers are called

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