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Enzymes

HBIO3 unit 4 Nov 1st

QuestionAnswer
Enzymes are Biological molecules that: -Lower the amount of energy needed to start a reaction -Speed up reactions - allow reactions to start faster -Put two or more things together (Anabolism -Break things apart (Catabolism)
Activation Energy - E act is The amount of energy need to start the reaction
Reactants are Things that are put together or broken apart - substrates
Products are The results of the reactions
Enzymes end in -ase
Substrates are What the enzyme works on
Active site is -Specific to the substrate(s) -Created by 3° folding of proteins -Shape and/or chemical based
Induced fit is When the enzyme changes shape
Denaturing is Changing the tertiary structure of the enzyme ---> enzyme unfolds ----> active site is destroyed ---> enzyme doesn't work anymore
Denaturing happens when Homeostasis is not maintaining a stable internal environment (homeostatic set point) - pH and/or temperature is wrong
Enzyme inhibitors Stop the enzyme from working
Non - competitive inhibition is When the inhibitor binds anywhere other than the active site, changing the shape of the enzyme so it cannot bind to the substrate
Competitive inhibition is When the inhibitor binds to the active site, interfering and disabling the enzyme from binding to the substrate
Properties of enzymes are -Enzymes are specific (only binds to one type of substrate) -Enzymes are not used up by the reaction (can be used over and over again) -Enzymes are sensitive to homeostatic set-points (changes in pH or temp. messes them up)
Catalase is a Ubiquitous enzyme (it is in every living thing)
Catalase's substrate is Hydrogen peroxide - H(2)O(2)
Catalase reaction formula is 2H(2)O(2)-----> 2H(2)O + O(2) (Safe) or H(2)O -----> H(2) + O(2)(Explosive)
Created by: erica.y
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