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물질대사란 무엇인가?
Metabolism represents all of the chemical activity in a cell, including reactions that build molecules (anabolism) and those that break molecules…
열역학 제1법칙
The First Law of Thermodynamics states that energy cannot be created or destroyed, only transformed. This can be demonstrated within a classic food…
열역학 제2법칙
The Second Law of Thermodynamics states that entropy, or the amount of disorder in a system, increases each time energy is transferred or…
운동 에너지
Kinetic energy is the ability of an object in motion to do work or enact change. It can take on many forms. For instance, water flowing down a…
위치 에너지
Potential energy is a stored form of energy that has the potential to do work, and therefore, to be converted into kinetic energy. Gravitational…
자유 에너지
Free energy—abbreviated as G for the scientist Gibbs who discovered it—is a measurement of useful energy that can be extracted from a…
활성화 에너지
Activation energy is the minimum amount of energy necessary for a chemical reaction to move forward. The higher the activation energy, the slower the…
ATP의 가수분해
The bonds of adenosine triphosphate (ATP) can be broken through the addition of water, releasing one or two phosphate groups in an exergonic process…
인산화
The addition or removal of phosphate groups from proteins is the most common chemical modification that regulates cellular processes. These…
유도 적합 모델
Most chemical reactions in cells require enzymes—biological catalysts that speed up the reaction without being used up or permanently changed.…
효소 반응속도론
Enzymes speed up reactions by lowering the activation energy of the reactants. The speed at which the enzyme turns reactants into products is called…
효소 억제
Inhibitors are molecules that reduce enzyme activity by binding to the enzyme. In a normally functioning cell, enzymes are regulated by a variety of…
되먹임억제 (피드백 저해)
Biochemical reactions are occurring constantly in cells, converting starting substances to different products, usually with the help of enzymes that…
다른자리입체성 조절
Allosteric regulation of enzymes occurs when the binding of a molecule to a different location from the active site causes a change in enzymatic…
보조인자와 보조효소
Enzymes require additional components for proper function. There are two such classes of molecules: cofactors and coenzymes. Cofactors are metallic…
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