BIOL 1541L Lecture Notes - Lecture 8: Exergonic Reaction, Metabolic Pathway, Endergonic Reaction

• School: University of Arkansas
• Department: Biology
• Course: BIOL 1541L
• Professor: John Shadwick

Document Summary

Lecture notes chapter 6: metabolism: sum of all the chemical reactions in a cell, breaking down and building up of molecules, catabolism: breaking down molecules, anabolism: building molecules. Energy of activation: energy that must be added to cause reactants to react with one another, need a match to start wood burning, enzymes lowers the energy of activation, do not change the end result of the reaction. Factors affecting enzymatic speed: substrate concentration, more collisions between substrate and enzyme, as more active sites are lled with substrate, more product will form, temperature and ph, enzyme activation, enzyme inhibition, enzyme cofactors, substrate concentration. Temperature: enzyme activity increases as the temperature rises, higher temperatures cause a larger number of effective collisions between enzymes and substrates. Viii. ph: each enzyme has an optimal ph at which its activity is the highest, enzyme structure is also ph dependent, extremes of ph can denature an enzyme by altering its structure.