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an essential structural component of living cells and source of energy for animals (sugar)


a simple sugar


Fat, nonpolar molecule, macromolecule


Macromolecule made of amino acids

Amino acid

Building blocks of proteins

Nucleic Acid

an organic compound, either RNA or DNA, whose molecules are made up of one or two chains of nucleotides and carry genetic information, macromolecule


in a nucleic-acid chain, a subunit that consists of a sugar, a phosphate, and a nitrogenous base


deoxyribonucleic acid, the material that contains the information that determines inherited characteristics, macromolecule, 2 strands


ribonucleic acid, macromolecule, 1 strand


(adenosine triphosphate) main energy source that cells use for most of their work


the ability to do work or cause change or moves matter

Activation energy

energy needed to get a reaction started


protein that speeds up a chemical reaction


The reactant on which an enzyme works.

Active Site

the site on an enzyme that attaches to a substrate


large molecule formed by joining smaller molecules together

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