A) Chlorella pyrenoidosa
B) Cladophora
C) Purple & green sulphur bacteria
D) Blue green algae
Correct Answer: C
Solution :
[c] By studying purple sulphur bacteria and green sulphur bacteria, Cornelius Van Niel was the first scientist to demonstrate that photosynthesis is a light-dependent redox reaction in 1931, in which hydrogen from an oxidisable compound reduces carbon dioxide to cellular materials. This can be expressed as: \[2{{H}_{2}}A+C{{O}_{2}}\to 2A+C{{H}_{2}}O+{{H}_{2}}O\], where A is the electron acceptor. His discovery predicted that \[{{H}_{2}}O\] is the hydrogen donor in green plant photosynthesis and is oxidised to \[{{O}_{2}}\].
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