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Biology-Life Sciences

Standard B: Enzymes

Standard A: Plasma Membranes
Standard B: Enzymes
Standard C: Prokaryotic Cells, Eukaryotic Cells, and Viruses
Standard D: Central Dogma of Molecular Biology
Standard E : The endoplasmic reticulum and golgi apparatus
Standard F: Chloroplasts
Standard G: Mitochondria
Standard H: Macromolecules
Standard J : The Cytoskeleton and Cell Wall
Standard I : ATP production
Exemplar Chart

Enzymes are organic compounds that speed up chemical reactions without changing.  The term "organic" is used to describe a molecule that contains carbon and hydrogen.  An enzyme is type of catalyst.  A catalyst is an inorganic compound that speeds up chemical reactions and remains unchanged.  When the rates of two reactions are occurring at the same time it is called equilibrium.  Enzymes are made up of long chains of proteins that are folded a certain way.  There are tons of different enzymes, and each enzyme has a specific job in specific chemical reactions.  For example, when breaking down sugar to use as energy, there are 10 different enzymes, each with their own reaction.

Enzymes stop working when there is a dramatic change in temperature or pH level.  When an enzyme no longer works it is called denatured.  For example, if you change an enzymes temperature or pH level, it will stop working because it has become denatured.  Although higher temperatures usually cause more collisions among enzymes, which leads to an increase in the rate of reactions, if the temperature reaches above a certain point, the enzyme activity begins to decline.