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Chapter 3
31
Biology
9th Grade
11/06/2011

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Term

Monomer

Definition

"one unit"

small molecules making up a polymer

Term
Polymer
Definition

"many units"

large molecules assembled from individual, small molecules

Term
organic
Definition
compounds with at least two carbons
Term
inorganic
Definition
all other compounds that don't have at least two carbon atoms
Term
hydrocarbon
Definition
compound cpntaining hydrogen and oxygen, used for fuel
Term
functional group
Definition
groups of atoms that give special properties to organic compounds
Term
hydroxyl group
Definition
(-OH)
Term
carboxyl group
Definition
(-CO(OH))
Term
amine group
Definition
(NH2)
Term
phosphate group
Definition
-P04
Term
carbohydrate
Definition
organic molecules with C, H and O, used for energy, support (CH2O formula)
Term
monosaccharide
Definition

single or simple sugars

(glucose, fructose)

Term
disaccharide
Definition

two sugarsĀ 

(sucrose, lactose, maltose)

Term
polysaccharide
Definition

Sugar polymer

used for storage

Term
lipid
Definition
contain CO and H: waxy fatty oily used for energy hear, protection, preventing water loss from leaves, helps nerves carry messages, cover cells
Term
saturated
Definition

fatty as=cu=ids with no double bonds as many hydrogen bond possible

packs close together (solid: butter lard)

implicated in heart disease and high cholesteral

Term
unsaturated
Definition

fatty acid with double bond polyunsaturae fats mre than one double bond between carbonĀ 

Cannot pack close together(oils)

Term
protein
Definition

polymer of amino acids used for building materials, helping chemical reactions

20 types of AMINO ACIDS

Term
amino acid
Definition
are joined by peptide bonds (between carboxyl and amine groups) to form a polypeptide.
Term
primary structure
Definition
sequence of amino acids
Term
seconday structure
Definition
shape obtained when polypeptides fold and twist locally
Term
tertiary structure
Definition
large scale 3D shape
Term
quaternary structure
Definition
2+ polypeptide chains
Term
nucleotide
Definition
monomers of nucleic acid
Term
enzyme
Definition
a catalyst in living things, usually protein
Term
metabolism
Definition
sum of all chemical reactions in a cell
Term
substrate
Definition
substance changed by the enzyme
Term
active site
Definition
part of substrate where enzyme binds
Term
activation energy
Definition
energy required to start a reaction
Term
lock and key model
Definition
enzyme and substrate fit together like a lock and key, on enzyme one catalyzes one reaction
Term
denaturation
Definition
loss of function due to change in 3D shape caused by extreme conditions. (high temperatures)
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