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15 Cards in this Set

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  • Back
Metabolism
the sum of all the biochemical reactions that occur in cells
Catalysts
speed up rate of chemical reactions without being permanently changed themselves
- used over and over again to speed up the same reaction
ENzymes
- biological catalysts
- not all proteins are this
-bring reactants together
-lower energy of activation for a reaction
-allow reactions to occur at a temp living things
- have optimum temps & pH ranges
Active site of the enzyme
where the reactants or substrate temporarily bind, forming enzyme-subtrate complex
denuration of enzzymes
- can be done by extremes of temp -- heat & ph
- can chance the physical and chemical structure of the enzyme so it can't function properly
- usually perm
irreversible inhibitors
poisons that bind permanently to an enzyme and can totally prevent it from functioning
reversible inhibitors
bind weakly and temp. to an enzyme and can act as important regulars in enzymatic pathways, "turning on & off"
Lipase
cataylze the hydrolysis of LIPIDS
Sucrase
catalyze the hydrolosis of sucrose
Pepsin
enzyme produced in the tummy
begins digestion of protein
Ptyalin
found in saliva that begins digestion of starch
Catecholase
enzyme found in potato tubers that catalyzes the oxidation of a molecule called catechol to produce the product quinone
quinone
as these molecules accumulate, they link together and produce melanin
browning of food
takes place during processing and storage
impairs the sensory properties of food products
preservatives
acids, halides, phenolic acids, sulfties, and ascorbic acids
-inhibits chem. reaction that causes browning of food