BIOC 2580 Lecture Notes - Lecture 4: Leaving Group, Three Steps, Stoichiometry

• School: University of Guelph
• Department: Biochemistry
• Course: BIOC 2580
• Professor: Enoka Wijekoon

Document Summary

Lecture 4 atp as cellular energy currency. The cell needs to make, store, and use energy. Without energy a cell cannot synthesize metabolites or carry out physiological functions. All cells rely primarily on the formation and hydrolysis of phosphorylated chemicals, especially. Fritz lipmann first discovered the significance of. Atp is a nucleotide: made up of a base (adenine), a sugar (ribose), and 3 phosphate groups (alpha, beta, gamma) A 70 kg person uses about 40 kg of atp during a restful day! Atp is not a store of chemical energy it is a link between catabolism and anabolism. Atp is produced in exergonic reactions and consumed in endergonic reactions. Cells break down nutrient molecules (catabolism) and use that available free energy to synthesize atp from adp. So, atp then donates its energy to endergonic processes that require energy like: synthesis of metabolic intermediates and macromolecules (anabolism, active transport across membranes, mechanical motion, etc.