| TERMS | DEFINITIONS | |
| Energy | The capacity, to do work is called energy. | |
| Work | Work is the transfer of energy. | |
| Thermodynamics | The study of energy is called thermodynamics | |
| kilocalorie | A kilocalorie (Kcal) is the amount of heat necessary to raise 1 kg of water 1° C and is equal to 1,000 calories. | |
| Calorie | A calorie (c) is the amount of heat it takes to raise the temperature of 1 g (1 cc) of water 1° C from 14.5 to 15.5′ C | |
| Enzyme | An enzyme is a biological catalyst that can accelerate a | |
| specific chemical reaction by lowering the activation
energy but remain unaltered in the process. |
|
| First law of thermodynamics | It states that all objects in the universe tend to become more disordered and that the total amount of disorder in the universe is continually increasing. |
| Entropy
. |
The measure of degree of disorganization is called |
| Activation energy | The minimum amount of free energy to start an activation reaction is called chemical energy. |
| Free energy | The amount of excess energy is called free energy. |
| Catalysis | The lowering of the activation of energy of a reaction is called catalysis. |
| Catalyst | Any substance that performs catalysis is called a catalyst. |
| Cofactors | The metal ions which are loosely attached with the enzymes are called cofactors. |
| Substrate level phosphorylation | The synthesis of ATP during reaction of glycolysis and Krebs cycle is called substrate level phosphorylation. |
| Chemiosmosis | The coupling reaction in which synthesis of ATP molecule takes during movement of W across an W gradient is called chemiosmosis. |
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