The energy required to initiate an endergonic reaction
ATP (adeosine triphosphate)
The molecule that provides energy for the cell. ATP is used to fuel the endergonic reactions of life.
The potential energy that exists in the bonds of molecules.
Work performed by chemical reactions
Large, energy coupling proteins that lower the activation energy of endergonic reactions enough to allow them to occur safely in biological systems.
The way in which reactions catalyzed by enzymes are regulated. When a product of an enzymatically catalyzed reaction builds up, the high level of the product causes the enzyme to inactivate and the reaction stops. When the level of the product gets lower, the enzyme activates and the reaction starts again.
First Law of Thermodynamics
The concept that energy is neither created nor destroyed in a closed system.
The amount of energy available to perform work in a system.
Induced Fit Theory
The theory of how enzymes function. The first part of the theory states that the enzyme and substrate fit together like a lock and key. The second part of the theory states that once the enzyme fits into the substrate, the substrate undergoes a change in shape to further enhance the catalytic property of the enzyme.
The energy of motion, or active energy; work being done.
Energy which is transferred from one object to another.
Work that is done when energy is transferred from one object to another.
Stored energy; the ability to do work.
Second Law of Thermodynamics
The concept that both chemical reactions and systems favor the creation of more disorder or randomness.
A set of connected components that function to transfer energy.
The study of energy transformation (or transfer) in nature.