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Stofwisseling oefentoets

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stofwisseling oefentoets 5VWO

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Oefening stofwisselingtoets

1. Tijdens het fotosyntheseproces wordt CO2 gebruikt voor de synthese van suikers in
De Calvincyclus
2. Jan Baptista van Helmont (1579 - 1644)
toonde als eerste experimenteel aan dat
een plant niet groeit door het omzetten van
de aarde waar hij in wortelt. Van Helmont
deed dit door de droge aarde te wegen
waarmee hij een boom in een pot plantte,
en vijf jaar later de boom en de gedroogde
aarde opnieuw afzonderlijk te wegen. Maar
hij trok hieruit de verkeerde conclusie: dat
de boom alleen door omzetten van water
was gegroeid.

Met welke inbreng vergat hij rekening te
houden? Met die van:
Zuurstof, Koolstofdioxide, suikers, mineralen in de bodem
3. Welke van onderstaande beweringen is onjuist?
A De thylakoidmembraan is de plaats waar de Calvincyclus doorgaat
B De thylakoidmembraan bevat chlorofyl a moleculen
C De thylakoidmembraan bevat lipiden en eiwitten
D De thylakoidmembraan bevat fotosystemen I en II
4. De belangrijkste producten van de lichtreacties zijn:
A A co2 en h2o
B ATP en NADPH
C ATP en suikers
D Zuurstof en water
5. Op het einde van de elektronentransportketen worden energierijke elektronen
overgedragen op
A ATP
B ADP
C NADP+
D NADPH
6. Wat stelt (X) voor in volgende zin:
“Gedurende de lichtreacties geeft (X) elektronen door aan de
elektronentransportketen”?
A Chlorofyl a
B Chlorofyl b
C NADP+
D Zuurstofgas
7. Een belangrijke bijdrage van water aan de lichtafhankelijke reacties bestaat uit het
leveren van
A Fotonen
B Zuurstof
C Elektronen

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