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Fiche révision les enzymes

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Voici une fiche de révision d'un cours sur les enzymes.

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Uploaded on
May 17, 2022
Number of pages
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Written in
2021/2022
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ENZYMES
→ protéines biocatalyseurs qui accélèrent vitesse réactions biochimiques sans les modifier

Caractéristiques :
Sensibles à la température
-30°c < enzyme < 40°c
Forte t°c → destruction ( = dénaturation de la protéine )




Sensibles à l'acidité du milieu
Chacune des enzymes n'est active que pour zone ph donnée
(ordonnée = vitesse de réaction )




I. MODE D'ACTION DES ENZYMES :
double specificite

→ ne réalise qu'1 type de réaction

Synthèse / oxydation / simplification

Enzymes digestives permettent hydrolyse → se nomme hydrolase

Ex : saccharase et amylase → hydrolases

→ n'agit que sur 1 type de substance à transformer ( substrat de l'enzyme )
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