What aspect of photosynthesis are we specifically measuring with these experiments?

Question

What aspect of photosynthesis are we  specifically  measuring with these experiments?

Answer

The presence of protons to be used for ATP production.

Answer

The presence of carbohydrates synthesised in the Calvin cycle.

Answer

How much light is absorbed by the chlorophyll molecules in the leaf.

Answer

The release of O 2  from the oxidation of H 2 O.

Answer

The availability of electron donors after the photolysis of water.

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