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30
Biology
9th Grade
09/28/2011

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Term
organic compounds
Definition
made primarily of carbon atoms
Term
inorganic compounds
Definition
do not usually contain carbon atoms
Term
functional groups
Definition
clusters of atoms in organic compounds
Term
monomers
Definition
small, simple molecules of carbon compounds
Term
polymer
Definition
a molecule that consists of repeated, linked units
Term
macromolecules
Definition
large polymers
Term
condensation reaction
Definition
the chemical reaction by which monomers link to form polymers
Term
hydrolysis
Definition
a reaction in which water is used to break down a polymer
Term
adenosine triphosphate (ATP)
Definition
a compound that provides energy to cells
Term
carbohydrates
Definition
organic compounds composed of carbon, hydrogen, and oxygen in a ratio of about one carbon atom to two hydrogen atoms to one oxygen atom
Term
monosaccharide
Definition
a monomer of a carbohydrate
Term
dissacharide
Definition
formed when two monosaccharides combine in a condensation reaction
Term
polysaccharide
Definition
the complex molecule composed of three or more monosaccharides
Term
proteins
Definition
organic molecules composed mainly of carbon, hydrogen, oxygen, and nitrogen
Term
amino acids
Definition
linked monomers
Term
peptide bond
Definition
two amino acids covalently bonded
Term
polypeptides
Definition
long chains of amino acids
Term
enzymes
Definition
RNA or protein molecules that act as biological catalysts
Term
substrate
Definition
the reactant being catalyzed in an enzyme reaction
Term
active site
Definition
the folds of an enzyme
Term
lipids
Definition
large, nonpolar organic molecules that do not dissolve in water
Term
triglycerides
Definition
composed of three molecules of fatty acids joined to one molecule of alcohol glycerol
Term
fatty acids
Definition
unbranched carbon chains that make up most lipids
Term
phospolipids
Definition
two fatty acids attached to a molecule of glycerol
Term
wax
Definition
a type of structural lipid consisting of a long fatty-acid chain joined to a long alcohol chain
Term
steroids
Definition
molecules composed of four fused carbon rings with various functional groups attached to them
Term
nucleic acids
Definition
large and complex organic molecules that store and transfer important information in the cell
Term
deoxyribonucleic acid (DNA)
Definition
contains information that determines the characteristics of an organism and directs its cell activities
Term
ribonucleic acid (RNA)
Definition
stores and transfers information from DNA that is essential to the manufacturing of proteins
Term
nucleotide
Definition
linked monomers that make up polymers made of three main components: a phosphate group, a five-carbon sugar, and a ring-shaped nitrogenous base
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