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Ch 3
ch 3
28
Biology
9th Grade
11/02/2014

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Term
Carbohydrate
Definition
monosaccharides, disaccharides and polysaccharides
Term
Monosaccharide
Definition
a simple sugar with a 1:2:1 ratio of C, H, and O.
Term
Disaccharide
Definition
a double sugar; two monosaccharides.
Term
Polysaccharide
Definition
3 or more monosaccharides.
Term
Protein
Definition
organic compounds containing mainly CHON.
Term
Amino acid
Definition
monomers of proteins (units that make up proteins).
Term
Peptide bond
Definition
a covalent bond between amino acids.
Term
Polypeptide
Definition
long chain of amino acids.
Term
Enzyme
Definition
RNA or protein that acts as a catalyst.
Term
Substrate
Definition
molecule on which an enzyme acts.
Term
Active site
Definition
folds in an enzyme.
Term
Lipid
Definition
large, nonpolar organic molecules.
Term
Fatty acid
Definition
unbranched carbon chains that make up lipids.
Term
Phospholipid
Definition
a liquid having two fatty acid chains and a phosphate.
Term
Wax
Definition
a lipid with a long fatty-acid chain and a long alcohol chain.
Term
Steroid
Definition
contains 4 carbon rings with various functional groups attached.
Term
Nucleic acid
Definition
organic molecule group that stores and transfers genetic information.
Term
Deoxyribonucleic acid (DNA)
Definition
contains information for cell activities or to determine characteristics of an organism.
Term
Ribonucleic acid (RNA)
Definition
a molecule that stores and transfers information from DNA necessary in the formation of proteins.
Term
Nucleotide
Definition
a phosphate joined to a 5-carbon sugar joined to a nitrogen base.
Term
Organic compound
Definition
most matter in living organisms; made mainly of C atoms.
Term
Functional group
Definition
clusters of atoms that affect the characteristics of a molecule.
Term
Monomer
Definition
small, simple carbon compounds.
Term
Polymer
Definition
molecule made of repeating units.
Term
Macromolecule
Definition
large polymers.
Term
Condensation reaction
Definition
the linkage of monomers into a polymer with a release of water.
Term
Hydrolysis
Definition
the breakdown of a molecule using water.
Term
ATP
Definition
Adenosine triphosphate
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