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The Chemistry of Life
First Chapter of BSCS Biology Book Vocabulary
51
Biology
10th Grade
09/24/2012

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Term
Polypeptide
Definition
The name given to a polymer of amino acids; equivalent to protein. A long chain of chemically bonded amino acids.
Term
Carboxyl
Definition
Functional group of many organic acids; Function group (COOH) that gives up a proton in aqueous solutions; acidic
Term
Polar
Definition
A covalent bond where the electrons are not shared equally among the bonded atoms
Term
Unsaturated Fats
Definition
A fatty acid with one or more double bonds. Tend to be oily liquids at room temperature. Ex. Olive oil, corn oil, and sunflower oil.
Term
Bilayer
Definition
Arrangement of phospholipids in cell membranes
Term
Saturated Fats
Definition
A fatty acid with no double bonds. Tend to be solids at room temperature. Ex. Butter and lard.
Term
Sucrose
Definition
A disaccharide consisting of glucose and fructose
Term
Ion
Definition
An atom that has gained or lost one or more electrons
Term
Polymer
Definition
Monomers bonded end to end in a long chain
Term
Glucosamine
Definition
The monomer of chitin
Term
Hydrophilic
Definition
Descriptive of water-soluble, polar molecule
Term
Hydrolysis
Definition
A reaction that breaks down molecules with the addition of a water molecule
Term
Phospholipid
Definition
Glycerol, 2 fatty acids, and a phosphate group; major component of cell membranes
Term
Triglyceride
Definition
Dietary lipid with a glycerol residue bonded to 3 fatty acids.
Term
Base
Definition
Solid, liquid, or gas that results in the dissociation of hydroxide ion.
Term
Ribose
Definition
The 5-carbon sugar component of RNA
Term
Dehydration
Definition
A reaction that joins monomers by removing a molecule of water
Term
Electrolyte
Definition
A solution with liberated ions and electrons capable of conducting electric current
Term
Methyl
Definition
An alcohol with only one carbon.
Term
Nonpolar
Definition
A covalent bond with electrons shared equally among bonded atoms
Term
Proteins
Definition
A polymer of amino acids
Term
Lactose
Definition
A disaccharide consisting of glucose and galactose
Term
Chitin
Definition
A polymer of glucosamine found in arthropod exoskeletons and fungal cell walls
Term
Peptide
Definition
The covalent bond between amino acids.
Term
Ethyl
Definition
An alcohol with 2 carbons
Term
Tertiary Structure
Definition
The 3-D structure of proteins based on chemical and polar interactions between amino acid side chains. Usually globular, or spherical
Term
Secondary Structure
Definition
The level of protein structure based on hydrogen bonding between amino acid side chains. Most common secondary structures: Alpha Helix & Beta Sheet.
Term
Hydrophobic
Definition
Descriptive of fat-soluble, non-polar molecules.
Term
Hydrophobicity
Definition
major forces controlling how a protein folds. The tendency for non-polar amino acids to avoid water.
Term
Cellulose
Definition
A polymer of glucose found in the cell walls of all plants
Term
Glycogen
Definition
A polymer of glucose found in animal cells
Term
-ane
Definition
Suffix for all hydrocarbons with only single bonds between the carbons
Term
Primary Structure
Definition
The level of protein structure based on the sequence of amino acids. Sequence of amino acids in a polypeptide chain.
Term
Saccharide
Definition
Technical term for sugar
Term
-ol
Definition
Suffix for molecules containing at least one hydroxyl group
Term
Amino Acids
Definition
Monomer of proteins
Term
Deoxyribose
Definition
5-carbon sugar of DNA
Term
pH
Definition
The measure of the acidity of a solution
Term
Carbohydrate
Definition
Class of organic molecules with a C:H:O ration of 1:2:1.
Term
Double Bond
Definition
Bond involving two pairs of shared electrons
Term
Amine Group
Definition
Function group that strips a proton from a water molecule, resulting in a dissociated hydroxide ion. Structural Formula: NH(subscript)2 or CNH(subscript)2.
Term
Isomers
Definition
Molecules with the same empirical formula, but with different structures and characteristics
Term
Nitrogen
Definition
Element with 5 valence electrons; component of proteins and nucleic acids
Term
Hydroxyl
Definition
Function group with -OH
Term
Lipids
Definition
Class of non-polar molecules
Term
Monomer
Definition
Generic term for the units joined together in a polymer
Term
Alcohol
Definition
Class of organic molecules containing a single hydroxyl group
Term
Amylose
Definition
The scientific name of plant starch
Term
Acid
Definition
Solid, liquid, or gas that results in a dissociated hydrogen ion.
Term
Purines
Definition
Adenine & Guanine
Double ring structure
Term
Pyrimidine
Definition
Cytosine & Thymine
one ring structure
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