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The combining of distinct parts or elements to form a whole.

A polymer of amino acids.

A five-carbon monosaccharide found in ribonucleic acid (RNA).

An organic molecule that has only carbon-carbon single bonds.

One of five chemical elements that are found in small amounts in living organisms; these include sodium, magnesium, sulfur, chlorine, and potassium.

A substance that has a fixed shape and volume. A state of matter.

A polymer of glucose that is used primarily for energy storage in plants.

A molecule in which four atoms are bound to a central atom, resulting in a tetrahedral shape. The atoms bonded to the central atom lie at the corners of a tetrahedron with 109.5 degree angles between them.

An element required in minute quantities by an organism to maintain proper physical functioning.

A lipid formed by a condensation reaction between glycerol and three fatty acid molecules.

An organic molecule that has at least on carbon-carbon double bond.

A solution whose pH is less than 7.

An organic molecule that functions as the building block for proteins; it contains both an amino group and a carboxylic acid group.

A solution that produces hydroxide ions (OH-) when dissolved in water.

A solution whose pH is greater than 7.

A "hydrate of carbon"; any molecule with the simplest formula CH2O.

A polymer of glucose that is used primarily for structure in plants.

An attractive force between two or more atoms or ions that holds them together.

A chemical reaction that joins two molecules and removes a molecule of water.

A chemical bond where the electrons are shared between atoms.

A chemical compound whose atoms are arranged in a ring or closed-chain structure.

The ration of a substance's mass to its volume.

A five-carbon monosaccharide found in deoxyribonucleic acid (DNA).

A lipid that consists of a long hydrocarbon chain with a carboxylic acid group at one end.

Protein that fold into an elongated shape so that it can serve a wide variety of structural functions in the cell.

An isomer of glucose; it has the same chemical formula (C6H12O6) but its atoms are arranged differently.

A substance that has no fixed volume or shape. A state of matter.

A protein that folds into a compact shape so that the polar and ionic amino acids are on the outside and the nonpolar amino acids are on the inside.

A monosaccharide that contains six carbon atoms.

An attractive force between a hydrogen atom bonded to an oxygen, nitrogen, or fluorine atom on one molecule and an ocygen, nitrogen, or fluorine atom on another molecule.

A compound or molecule that is carbon-base.

A monosaccharide that contains five carbon atoms.

A scale that indicates the acidity of a solution; it is based on the concentration of hydrogen ions.

A lipid molecule formed by the condensation reaction between glycerol, two fatty acid molecules, and a phosphate group.

A molecule with an uneven distribution of electrons.

A large molecule that is formed when small molecules are joined.

A carbohydrate that contains many sugar units.

One of six chemical elements that make up more than 99% of living matter; these include calcium, hydrogen, oxygen, and phosphorus.

A polymer of amino acids.