question_answer

Which is the evidence to show that \[{{O}_{2}}\] released in photosynthesis comes from water?

A) Isotopic \[{{O}_{2}}\] supplied as \[{{H}_{2}}O\] appears in the \[{{O}_{2}}\] released in photosynthesis.

B) Isolated chloroplast in water releases \[{{O}_{2}}\] if supplied potassium ferricyanide or some other reducing agent.

C) Photosynthetic bacteria use \[{{H}_{2}}S\] and \[C{{O}_{2}}\] to make carbohydrates.

D) All of the above