1.5 Bioenergetics Flashcards
Reactions that produce energy; derogative; breakdown of large molecules into small molecules
Catabolic reactions
Reactions that utilize energy
anabolic reactions
Laws of thermodynamics
First: the total energy of a system remains constantSecond: the total entropy of a system must increase if a process is to occur spontaneously
Is the measure of the degree of randomness in a system
Entropy
Energy that is available to do work
Free Gibbs Energy Change
Standard free energy change; state conditions
T=25oC, 298 KP = 1 atm[C] = 1M reactants and productspH = 7.0
Free gibbs energy that will produce a spontaneous reaction
Negative
Type of reaction where, as reaction progresses, energy is releasedSpontaneous reactionForward direction of reaction
Exergonic reactions
Type of reaction where reactants have lower free energy than products; energy is used; non-spontaenous reaction; reverse direction
Endergonic reactions
At equilibrium, give the value of Gibbs free energy change
Zero.
Reaction where there is an addition of H20
Hydrolysis
Reactions where the liberation of energy in an exergonic reaction drives an endergonic reaction
Coupled Reactions
Criterion for spontaneity of a reaction
Gibbs Free Energy
Net driving force in a reaction
Gibbs free energy
