CH4_ Nucleic Acids and the RNA World.docx - DNA(deoxyribonucleic acid)\u2013 stores genetic information and is replicated by using proteins Stores info

CH4_ Nucleic Acids and the RNA World.docx -...

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DNA (deoxyribonucleic acid)–stores genetic information and is replicated by using proteins-Stores info required for growth and reproduction*DNA’s stability is good for storing info, but makes a poor catalystRNA (ribonucleic acid)–stored genetic information and catalyzed its own replication4.1 WHAT IS A NUCLEIC ACID?Nucleotide–composed of a phosphate group, a five-carbon sugar, and a nitrogenous base-The five-carbon sugar is ribose (in RNA), and is deoxyribose (in DNA)-Two types of nitrogenous bases:-Purines– adenine and guanine (two rings)-Two rings have nine atoms, and the name adenineand guanine-Pyrimidines–cytosine, uracil, and thymine (one ring)HOW DO NUCLEOTIDES POLYMERIZE TO FORM NUCLEIC ACIDS?:-Nucleotides polymerizevia condensation reactionsbetween the OH/hydroxyl (sugar) and a phosphate group (another nucleotide) to form a phosphodiester bond– a covalent bond between nucleotides that will release a water molecule-
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