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Samenvatting Biologie thema 4: Rol van enzymen bij stofwisselingsprocessen
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Samenvatting voor Biologie thema 4 Rol van enzymen bij stofwisselingsprocessen, VANIN, Biogenie 5.2
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Ayat Abouelyazied5ECOWET
Thema 4 – Rol van enzymen bij
stofwisselingsprocessen
Stofuitwisseling ≠ Stofwisseling (metabolisme; nieuwe stof)
Rol van enzymen: Reacties katalyseren
o Reacties versnellen
o Reacties vergemakkelijken
o Geen verandering
Enzym
o Driedimensionale gestructureerde proteïne
o Kapot: Werking gestopt
o Actief centrum + eiwit
Substraatspecifiek
Overeenkomen stof & enzym werking mogelijk
o Herbruikbaar
Reactiespecifiek
Niet kapot
Verandert van samenstelling
Weinig enzymen nodig
Veel chemische reacties mogelijk
o Beperkte levensduur nieuwe enzymen
2 soorten reacties
Anabole reacties = Assimilatie Katabole reactie = Dissimilatie
Enzymsubstraatcomplex
Enzymsubstraatcomplex
Substraat Reactieproducten Substraat Reactieproducten
Specifieke reactie
Opbouwenzym Specifieke reactie
Afbraakenzym
ZELFDE ENZYM
ZELFDE ENZYM
o Aanmaken o Afbreken
o Grote stoffen o Kleine stoffen
o Energie opnemen o Energie vrijkomen
Activeringsenergie
Drempelwaarde Drempelwaarde
Zonder enzym Zonder enzym
Veel activeringsenergie Veel activeringsenergie
Met enzym Met enzym
Minder activeringsenergie Minder activeringsenergie
Lichaam Traag Lichaam
Vrijgekomen energie
Traag Opgenomen energie
Naamgeving enzymen
Substraat/stofnaam + ASE: Amylum Amylase
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