BCHM 102 Lecture Notes - Lecture 21: Uric Acid, Alanine, Antibiotics
Document Summary
Identify the structure of nucleosides and nucleotides: understand the synthesis and degradation of purine and pyrimidine nucleotides. Nucleotides: nucleotide: deoxyribonucleoside or ribonucleoside (bound to) phosphates. Functions: nucleotides are essential for dna and rna synthesis, structural components of coenzymes (coa, fad, nad, nadp, serve as intracellular second messengers (camp and cgmp) convey signals through the body, currency of energy in the cell (atp) Nucleotide structure: dna: a, g, c, & t. A nitrogenous base + a pentose sugar + 1, 2 or 3 phosphate groups: nitrogen-containing bases belong to 2 families, purines: adenine (a) and guanine (g, pyrimidines: cytosine (c), uracil (u) and thymine (t) Found in some species of dna and rna. Transfer rna (trna: modifications help, recognize by specific enzymes, protect against degradations. Pentose sugar + nitrogen-containing base: adenosine, guanine, cytidine, thymidine and uridine. Pentose sugar can be: 2-deoxyribose, deoxyribonucleoside (dna, ribose, ribonucleoside (rna)