Exam 1: Definitions Flashcards
(21 cards)
Electrons
particles with negative charge
Protons
particles that are positively charged
Neutrons
particles with no charge
covalent bonds
electrons interacting with other electrons pair between the various atoms
Inert
a substance that is not chemically reactive
Eukaryotic cells
have a membrane bound nucleus
Prokaryotic cells
don’t have a membrane bound nucleus
Autotrophs
organisms that produce their food by using light, water, carbon dioxide or other chemicals
Amino Acids
the monomers that are building blocks of protein
Diffusion
the slow movement of molecules from an area of high concentration to an area of low concentration
Osmosis
the movement of water from an area of high concentration to an area of low concentration through a membrane
Nacre
made up of mostly B-sheets
Dimer
a molecule or molecular complex consisting of two identical linked together
Hetero-Dimer
a protein composed of two polypeptide chains differing in composition in the order, number, or kind of their amino acid residues
Homo-Dimer
a protein composed of two polypeptide chains that are identical in the order, number, & kind of their amino acid residues.
Lipid
an organic compound, found in organisms, that is primarily non-polar & hydrophobic
Cholesterol
fills the space between lipid tails, allows closer packing, decreases fluidity
Temperature Effects
higher temperatures increase fluidity & permeability
Ionic bonds
A form of chemical connection in which one atom loses valence electrons & gains them from another
Biological molecules
molecules that make up living organism
Condensation Reaction
a reaction in which two molecules combine to form a single molecule.
