Chapter 2 Vocabulary

Smallest basic unit of matter.

• cell

• atom

• molecule

• compound

Substance that dissolves in a solvent and is present at a lower concentration than the solvent.

• solvent

• solute

• solution

• substance

When substances change into different substances by breaking and forming chemical bonds.

• Chemical reaction

• Physical reaction

• solution

• compound

Reactant in a chemical reaction upon which an enzyme acts.

• catalyst

• substrate

• product

• element

Polymer of nucleotides; the genetic material of organisms.

• carbohydrate

• protein

• lipid

• nucleic acid

Substance in which solutes dissolve & that is present in greatest concentration in the solution

• solution

• solute

• solvent

• substance

Substance made of only one type of atom that cannot be broken down by chemical means.

• atom

• element

• compound

• molecule

Compound that donates a proton (H+) when dissolved in a solution.

• acid

• base

Substance that is changed by a chemical reaction.

• product

• reactant

Protein that catalyzes chemical reactions in organisms.

• substrate

• atom

• enzyme

• catalyst