BIOLOGY 1A03 Chapter Notes - Chapter 4: Hydrophile, Polymerization, Phosphodiester Bond
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BIOLOGY 1A03 Full Course Notes
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Biology chapter 4: nucleic acids and the rna world. Components of a nucleotide: phosphate group bonded to, sugar bonded to, nitrogenous base. Mainly two types of nucleotides: ribonucleotides. Oh group bonded to second carbon in the ring: deoxyribonucleotides. H group bonded to second carbon in the ring. Nitrogenous base attached at c #1, phosphate group at c #5, c #3 oh is involved in bonding with next nucleotide. Polymerization reaction involves the formation of a bond between the phosphate group of one nucleotide and the hydroxyl group of the sugar component of a nucleotide (phosphodiester bond) When nucleotides involve ribose, the polymer produced is ribonucleic acid (rna) When nucleotides involve deoxyribose, the polymer produced is deoxyribonucleic acid (dna) The sugar-phosphate spine of a nucleic acid is directional, as is the peptide-bonded spine of a polypeptide. Sequence of nitrogenous bases forms the primary structure of the molecule. Polymerization reactions are catalyzed by enzymes and is endergonic.