enzymes Flashcards
the ability to do work
energy
a substance that alters the rate (speed) of a chemical reaction without itself being changed or used up
catalyst
these are found in our stomach, small intestine, and pancreas. they regulate metabolism
enzymes
__________ speed up a reaction by lowering activation energy.
enzymes
___________ allow reactions to take place at lower temperatures.
enzymes
proteins that serve as catalysts to speed up or slow down reactions, remain unchanged, high specificity
enzymes
how do enzymes speed up reaction rate?
they lower the activation energy needed
what is enzyme specificity?
ability of an enzyme to choose exact substrate; it is a molecular recognition mechanism; recognition and specificity is based on structural complementarity
“breakdown” of large molecules into smaller units to release energy
catabolism
“building up” of molecules and materials (organs, tissues) by using energy
anabolism
anabolism + catabolism = ___________
metabolism
the sum of all chemical processes within living things
metabolism
proteins folded into a globular structure
enzymes
the reactants that the enzyme binds with to speed up the reaction
substrate
surface shape or cleft on the enzyme to which the substrate must fit like a lock and key
active site
