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Explain Van Niel experiment on purple and green sulphur bacteria. |
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Answer» Van Niel on his studies with purple and green sulphur bacteria doemonstrated that photosynthesis is a light dependent reaction in which hydrogen from an oxidisable compound reduces CO2 to form sugar. 2H2A + CO2 \(\overset{light}{\rightarrow}\) 2A + CH2O In Green plants, HO is the hydrogen donor and is oxidised to O2 In green sulphur bacteria, when H2O instead of HO was used as hydrogen donor no O2 was evolved. He inferred that O2 evolved by green plants come from H2O but not from CO2. |
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