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Robin Hill discovered that the isolated chloroplasts from plants can release oxygen when they are illuminated by sunlight in the presence of a suitable electron acceptor. This showed:

I. oxygen \((O_2)\) is produced by a reaction that is separate from carbon dioxide \((CO_2)\) fixation.
II. the reaction in which oxygen is released requires light.
III. the light dependent reaction of photosynthesis is a result of a series of redox reactions.
 
1. I and II only
2. I and III only
3. II and III only
4. I, II and III

Subtopic:  Historical View: Experiments |
 51%
Level 3: 35%-60%

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