Biology Chapter 2B-C

Question Answer
solution a uniform mixture
solvent substance that provides a solution (i.e. water)
solute substance dissolved in the solvent; isn't always a solid (i.e. salt)
concentration amount of solute packed into a solvent
acid substance that dissolves in water to produces hydrogen ions
base a substance that dissolves in water that produces hydroxide ions
Brownian motion particles in constant random motion; really affects small particiles
diffusion ability of matter to spread out
reactants substance that is present before a chemical reaction happens; usually found on the left hand side of a chemical equation; WHAT WE BEGIN WITH
products substance formed during a chemical reaction, usually found on the right-hand side of a chemical equation; WHAT WE END WITH
Exothermic reactions chemical reactions that produce energy
Endothermic reactions chemical change in which reactants have less energy than the products
Activation energy (Ea) energy needed or a chemical reaction to occur
Catalyst substance that provides an alternate route from reactants to products that doesn't require as much energy to jump-start
enzymes special group of catalysts that naturally occur in living things; has large molecules; responsible for important chemical reactions; makes reaction happen millions of times faster
active site a special spot where an molecule docks onto an enzyme
substrate molecule that docks in the active site on the enzyme; enzyme doesn't change
inhibitor substance used to reduce a catalyst's undesirable effects
neurotoxins can be catalyst or valuable inhibitor that be considered either a medicine or poison (i.e. atropine, poison found in nightshade plants, used to prevent heart attacks)

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