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Life 102 - Chapter 4
Biology flashcards for the first exam and fourth chapter in LIFE 102
19
Biology
Undergraduate 1
09/16/2012

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Term
Organic chemistry
Definition
the branch of chemistry that specializes in the study of carbon compounds
Term
4 elements that carbon most commonly bonds with
Definition
Hydrogen, Oxygen, Nitrogen, and Carbon (HONC)
Term
tetrahedral molecule
Definition
a carbon atom with four single bonds to other atoms
Term
flat molecule
Definition
two carbons joined in a double bond that makes all attached carbons lie on the same plane
Term
hydrocarbons
Definition
organic molecules consisting of only hydrogen and carbon, hydrophobic compounds because of the nonpolar carbon-to-hydrogen linkages
Term
isomers
Definition
compounds that have the same number of atoms and elements, but different structures and therefor different properties
Term
structural isomers
Definition
difference in the covalent arrangement of their atoms, different due to branching or different bonds formed
Term
cis-trans isomers
Definition
difference in arrangement around a double bond; same bonds, different spatial arrangements
Term
enantiomers
Definition
mirror image isomers due to the presence of an asymmetric carbon
Term
functional groups
Definition
chemical groups that affect the shape of a molecule and therefore its function
Term
hydroxyl groups (-OH)
Definition
polar molecules known as alcohols
Term
carbonyl groups (>CO)
Definition
known as ketones and aldehydes, forms two major groups of sugars called ketoses and aldoses
Term
ketones
Definition
carbonyl groups on the interior of a carbon skeleton
Term
aldehydes
Definition
carbonyl groups at the end of a carbon skeleton
Term
carboxyl groups (-COOH)
Definition
acids known as carboxylic acids or organic acids
Term
amino groups (-NH2)
Definition
bases known as amines
Term
sulfhydryl groups (-SH)
Definition
known as thiols; can form a covalent bond with each other which helps stabilize protein structure
Term
phosphate groups (-OPO3^2-)
Definition
known as organic phospates; contributes negative charges to the molecules of which it is a part
Term
methyl groups (-CH3)
Definition
known as methylated compounds; addition of these groups to DNA affects expression of genes; only nonreactive functional group
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