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Samenvatting biochemistry seventh edition Hfdst 11 tm 13 + 16 tm 19 + 22
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Samenvatting gebaseerd op colleges en het boek biochemistry seventh edition. Hoofdstukken 11,12,13,16,17,18,19,22
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CHAPTER TWELVE: THE PYRUVATE DEHYDROGENASE COMPLEX
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Samenvatting Biochemistry
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Van Hall LarensteinBiochemie
Samenvatting
Romée Terpstra
26-10-2020
,Inhoudsopgave
1. Inleidend college Concepten ........................................................................................................... 3
2. Inleidend college Elektronentransport............................................................................................ 5
3. Hfst 10- Fotosynthese ..................................................................................................................... 7
3.1 Licht reactie ............................................................................................................................. 7
3.2 Donker reactie (calvin cyclus) .................................................................................................. 9
Oefenvragen ........................................................................................................................................ 9
4. Hfst 11- Koolhydraten ................................................................................................................... 12
Deel 2 – glycoside binding ................................................................................................................. 12
Oefenvragen ...................................................................................................................................... 13
5. Hfst 12- Lipiden en membranen .................................................................................................... 15
5.1 Fosfolipiden ........................................................................................................................... 16
5.2 Glycolipiden ........................................................................................................................... 17
5.3 Cholesterol ............................................................................................................................ 17
5.4 Membraan compositie .......................................................................................................... 17
5.5 Eiwitten.................................................................................................................................. 18
6. Hfst 13- Kanalen en pompen ......................................................................................................... 19
6.1 Transport ............................................................................................................................... 19
6.2 Pompen (actief) ..................................................................................................................... 20
6.3 Secondary transporters ......................................................................................................... 21
6.4 Kanalen (passief) ................................................................................................................... 22
6.5 Cel-cel contact ....................................................................................................................... 22
7. Hfst 13- Secundaire metabolieten (in planten) ............................................................................. 24
7.1 De 3 groepen secundaire metabolieten ................................................................................ 24
8. Hfst 16- Glycolyse .......................................................................................................................... 27
8.1 Gluconeogenese .................................................................................................................... 30
8.2 Glycogeen afbraak ................................................................................................................. 31
Oefenvragen ...................................................................................................................................... 32
9. Hfst 17- Citroenzuurcyclus ............................................................................................................ 34
9.1 Beriberi en Korsakov ............................................................................................................. 35
9.2 Glyoxylaat cyclus ................................................................................................................... 36
Oefenvragen ...................................................................................................................................... 36
10. Hfst 18- Oxidatieve fosforylering .............................................................................................. 38
Oefenvragen ...................................................................................................................................... 40
11. Hfst 22- Vetzuurmetabolisme ................................................................................................... 42
Oefenvragen ...................................................................................................................................... 43
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, 1. Inleidend college Concepten
Bouw en functie eiwitten
Enzymen zijn uit eiwitten opgebouwd. Zoals hiernaast te zien
gekoppeld door peptide bindingen. De aminozuurvolgorde bepaalt
de 3d-structuur. De structuur zelf bepaalt de functie en de werking.
Alfa helix is opgevouwen, betasheet is de vouwing zelf
Endotherme-/exotherme reactie
• Verbranding glucose > levert energie C6H12O6 + 6O2 > 6CO2 + 6H2O
• Endotherme reactie moet warmte instoppen
Exotherme reactie komt warmte vrij (vind niet spontaan plaats)
Wat bepaalt of een reactie spontaan kan plaatsvinden:
Wanneer de ΔG0 negatief is ΔG0= ΔH0-T ΔS0
ΔH = enthalpie Endotherm (pos, niet spontaan) - exotherm (neg, makkie)
ΔS = entropie positief gunstig voor verloop
T = temperatuur (Kelvin)
Of de reactie spontaan is of niet, is te zien in een energiediagram (zie hieronder)
Horizontaal = uitgangsstoffen
Verticaal = producten
1= reactie waarbij energie vrijkomt
> moet de berg over, dan spontaan
2= reactie waar energie in moet >
moet constant energie (temp) in
stoppen
Activeringsenergie = klein bergje
aan het begin, waarna de reactie
pas op gang komt.
Een enzym verlaagt de activeringsenergie voor een
reactie, waardoor de reactie sneller gaat. Reactant
wordt verzwakt door enzym.
Dit betekent ook dat een reactie die normaal bij hoge
temp. pas speelt, nu bij lichaamstemp ook werkt.
>> dit is een voorbeeld van aflopende reactie.
Wanneer de producten gevormd zijn, gaan ze niet zo
makkelijk terug.
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