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samenvatting stofwisseling H1 biologie voor jou VWO 5
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Samenvatting omvattend alle stof van H1, stofwisseling
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Samenvatting biologie H1Stofwisseling= stof laten veranderen in andere stoffen
Planten autotroof maken organische moleculen uit kleine anorganische moleculen
(assismilatie)
Organische moleculen (C-verbindingen)
- Gemaakt door organismen
- Grote moleculen (suikers, vetten, eiwitten)
- Bevatten altijd C en H en vrijwel altijd O
- Bevatten vaak S, P, N
- Bevatten soms metalen (Fe) bvb rode bloedcellen (hemoglobine)
Anorganische moleculen
- In organismen en levenloze natuur
- Kleine eenvoudige moleculen
- Bvb CO, CO2, H2O
Assimilatie van glucose = 6CO2 + 6H2O C6H12O6 + 6O2
- Dmv licht
o Vrije energie (licht) wordt omgezet in gebonden energie of chemische energie
(glucose)
Dissimilatie van glucose = C6H12O6 + 6O2 6CO2 + 6H2O
- Dmv energie
- Wordt gebruikt voor:
o Assimilatie grotere moleculen (voortgezette assimilatie)
o Beweging
Koolstofassimilatie vorming van glucose uit de anorganische stoffen CO2 en molecuul
H door planten
- Energie nodig
Heterotrofe organismen
- Meeste bacteriën, de schimmels en de dieren
- Kunnen geen organische stoffen vormen uit alleen anorganische stoffen
Voortgezette assimilatie
- Grondstof glucose voor vorming van andere koolhydraten, vetten, eiwitten en DNA
- Mineralen zoals nitraten en fosfaten nodig in autotrofe organismen
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