<P> Robert Hill thought that a complex of reactions consisting of an intermediate to cytochrome b ( now a plastoquinone ) , another is from cytochrome f to a step in the carbohydrate - generating mechanisms . These are linked by plastoquinone , which does require energy to reduce cytochrome f for it is a sufficient reductant . Further experiments to prove that the oxygen developed during the photosynthesis of green plants came from water , were performed by Hill in 1937 and 1939 . He showed that isolated chloroplasts give off oxygen in the presence of unnatural reducing agents like iron oxalate , ferricyanide or benzoquinone after exposure to light . The Hill reaction is as follows : </P>
<P> Robert Hill thought that a complex of reactions consisting of an intermediate to cytochrome b ( now a plastoquinone ) , another is from cytochrome f to a step in the carbohydrate - generating mechanisms . These are linked by plastoquinone , which does require energy to reduce cytochrome f for it is a sufficient reductant . Further experiments to prove that the oxygen developed during the photosynthesis of green plants came from water , were performed by Hill in 1937 and 1939 . He showed that isolated chloroplasts give off oxygen in the presence of unnatural reducing agents like iron oxalate , ferricyanide or benzoquinone after exposure to light . The Hill reaction is as follows : </P>
what is the source of oxygen inside the plant during photosynthesis
what is the source of oxygen inside the plant during photosynthesis
chloroplasts
chloroplasts