Activation Energy

The energy that must be overcome in order for a chemical reaction to occur

Active Site

The region of an enzyme responsible for substrate binding and reaction catalysis


A general term for reactions that break larger molecules into smaller components


The loss of a protein's three dimensional functional structure is called this

... cellular membranes. Answer: Lipids

A class of organic compounds with an oily, greasy, or waxy consistency. Important as energy storage molecules and as components of...

Amino acids

The building blocks of proteins

Globular Proteins

These proteins are water soluble and have catalytic and regulatory roles in cells

Hydrogen bond

The attractive interation of a hydrogen atom with an electronegative atom, such as nitrogen, oxygen or fluorine

Induced fit model

The currently accepted model for enzyme function


Carbohyrate monomers. Examples include fructose and glucose.


The entire set of proteins expressed by a genome, cell, tissue or organism.

Primary Structure

The sequence of amino acods ina polypeptide.


Organic compounds, usually linear polymers, made of amino acids linked together by peptide bonds.


Organic molecules consisting only of carbon, hydrogen and oxygen that serve as structural components in cells and as energy sources


Any reagent that increases the rate of a chemical reaction but is itself not consumed by the reaction


These are biological catalysts


Substances required by an enzyme to enable its catalyic function


Reactions that release energy are called this


A general term for reactions that build larger molecules from smaller ones


The splitting of a molecule into smaller components by addition of water molecule


A general term for reaction in which water is released

Fibrous Protein

These proteins are very tough and often have a structural role in cells

Nucleic Acid

An information-carrying macromolecule composed of chains of nucleotides.


Complex carbohydrates with structural and energy storage roles in cells. Examples include cellulose, starch, and glycogen

Tertiary Structure.

The structure of a protein maintained by disulfide bonds and hydrophilic and hydrophobic reactions

Polar Molecule

A molecule, like water, in which the opposite ends are oppositely charged.


A fatty acid containing the maximum number of hydrogen atoms is called this.

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