BSCI170 Lecture Notes - Endergonic Reaction, Sucrose, Hydrolysis
Document Summary
Life is chemistry: life is tightly controlled, uncontrolled reaction, life is driven by chemical reactions operating under controlled conditions, a b, reactant product. The chemistry of life: all reactions are theoretically reversible, a b, remember: only favorable reactions can move forward (to the right) It is at equilibrium ( g = 0): doesn"t move, or. It is endergonic ( g = +): moves backward. Many cellular reactions are favorable: hydrolysis of sucrose, g = -7,000 cal/mol, highly favorable! Most favorable reactions do not occur very fast: sucrose + water = sucrose + water, nothing happens for many years. What is a catalyst: catalysts accelerate a reaction w/o being consumed or permanently changed, neither a substrate nor a product. Inorganic and organic catalysts: biological catalysts are called enzymes, usually a protein, may be a catalytic rna (ribozyme, can be regulated: up and down.
