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AP Bio Ch 3 Organic Chem
Organic Chemistry
26
Biology
12th Grade
10/05/2008

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Term
organic chemistry
Definition
study of carbon-based compounds; all living organisms are carbon based via atmospheric CO2 (plants)
Term
outer electron configuration
Definition
determines the kinds and number of bonds that an atom will form with other atoms
Term
tetravalence
Definition
whenever C is covalently bonded to four other atoms
Term
hydrocarbons
Definition
molecules consisting only of atoms of C and H, in backbones and side chains of varying lengths and shapes
store a relatively large quantity of potential energy in their bonds, and therefore serve as fuel reserves for organisms
hydrocarbon regions tend to be hydrophobic
Term
isomers
Definition
compounds that have the same molecular formula but different molecular structures
Term
structural isomer
Definition
differ in covalent arrangement of their atoms (glucose and fructose)
Term
geometric isomer
Definition
have same covalent partnership but differ in their spatial arrangement
Term
enantiomer
Definition
molecules are mirror images of each other; one is usually biologically inactive and the other is not
Term
hydroxyl group
Definition
--OH
alcohols
Term
carbonyl group
Definition
C=O
keytone-attached to internal carbon
aldehyde- on the end of a carbon chain
Term
carboxyl group
Definition
-COOH
weak acids
Term
amino acid group
Definition
-NH2
amines
amino acids are both amines and carboxylic acids
Term
phosphate group
Definition
Phosphate is an anion consisting of a phosphorus atom surrounded by 4 oxygen atoms
Functions in energy transfer between organic molecules
Term
sulflhydrl group
Definition
-SH
important in stablizing protein structures
Term
4 main classes of biological molecules
Definition
carbohydrates, lipids, nucleic acid, proteins
Term
macromolecule
Definition
gigantic molecules
carbs, protiens, lipids, nucleic acids
Term
polymer
Definition
small organic molecules joined in chains
Term
dehydration reaction (dehydrogenase)
Definition
/condensation reaction
when water is removed to make the polymer longer
Term
hydrolosis reaction
Definition
when water is added to break the polymer
Term
monosaccharide
Definition
simplest carbohydrate, one of the main sources of fuel for cellular work, provide raw material for building other molecules
Term
6-C (six carbon sugars)
Definition
hexoses
Term
5-C sugars
Definition
hexoses
Term
polysaccharides
Definition
long chains of sugar units
polymers of glucose linked by dehydration reactions
3 major types: starches, glycogen, cellulose
Term
starch
Definition
a-glucose polymer
long straight-chained amylose
branched-chain amylopectin
stored as insoluble starch granules in roots
easily hydrolyzed
Term
glycogen
Definition
a-glucose
highly branched and water soluble
stored by animals in liver and muscle cells
readily hydrolyzed
Term
cellulose
Definition
b-glucose
most abundant organic compound on earth
parallel chains may be cross-linked by H bonds to create microfibrils
provide structural rigidity, not easily hydrolyzed
fiber for plant eating animals
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