Biology Prentice Hall 9th Grade

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Vocabulary for Chapter 2.3 and 2.4


a simple compound whose molecules can join together to form polymers


large polymers


large compound formed from combination's of many monomers


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


Any of several carbohydrates, such as tetroses, pentoses, and hexoses, that cannot be broken down to simpler sugars by hydrolysis. Also called simple sugar.


large macromolecule formed from monosaccharides


macromolecule made mainly from carbon and hydrogen atoms; includes fats, oils, and waxes

Nucleic Acids

macromolecules containing hydrogen, oxygen, nitrogen, carbon, and phosphorus


monomer of a nucleic acid


ribonucleic acid; a nucleic acid that plays an important role in the production of proteins


deoxyribonucleic acid, the material that contains the information that determines inherited characteristics


macromolecule that contains carbon, hydrogen, oxygen, and nitrogen; needed by the body for growth and repair and to make up enzymes

Amino Acids

building blocks of proteins

Chemical Reaction

process that changes one set of chemicals into another set of chemicals


a chemical substance that is present at the start of a chemical reaction


a chemical substance formed as a result of a chemical reaction

Activation Energy

energy needed to get a reaction started


substance that speeds up the rate of a chemical reaction


protein that acts as a biological catalyst


the substance acted upon by an enzyme or ferment

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