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Samenvatting - Biologie I: toegepaste plantkunde: FOTOSYNTHESE $3.44   Add to cart

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Samenvatting - Biologie I: toegepaste plantkunde: FOTOSYNTHESE

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Mijn account bevat elk onderdeel dat aanbod komt in het vak toegepaste plantkunde in het eerste semester van Bio-ingenieurswetenschappen. Het bevat zo goed als alle informatie die gekend moet zijn voor het examen. De samenvattingen zijn gebasseerd op de slides van de prof en notities die ikzelf tij...

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  • March 8, 2024
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  • 2023/2024
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FOTOSYNTHESE
Overzicht van fotosynthese
- 6 CO2 moleculen voor maar 1 molecule glucose




Donkerreacties (calvin cyclus)
• Calvin cyclus: ATP en NADPH worden gebruikt om CO2 te reduceren en eenvoudige suikers te
synthetiseren
• Reductie van CO2 gebeurt in het stroma van chloroplasten
• Belangrijk suiker in de cyclus: Ribulose 1,5-bisfosfaat
• Fixatie van CO2 gebeurt door RuBP (=Ribulose 1,5-bisfosfaat) carboxylase = Rubisco
> Meest voorkomende enzyme wereldwijd, kan soms 40% van totaal oplosbaar proteïne in
bladeren uitmaken
• Eindproduct van Calvin cyclus is glyceraldehyde 3-fosfaat (G3P, 2G3P = glucose)
• G3P wordt getransporteerd naar cytosol: omgevormd tot glucose  sucrose

Calvin cyclus
• Stap 1: C fixeren
> 3 moleculen RuBP + 3 moleculen CO2 = 6
moleculen C3-pathway
> Dit wordt gedaan mbv Rubisco
• Stap 2: reductie
> 1 molecule G3P wordt 1/2 glucose
> 5 moleculen G3P worden terug RuBP
=> 9 ATP
=> 6 NADH voor ½ glucose moleculen

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