Question

The oxygen of O2 comes from water and not carbon dioxide in photosynthesis. Design an experiment...

The oxygen of O2 comes from water and not carbon dioxide in photosynthesis. Design an experiment that confirms this hypothesis.

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Answer #1

The experiment can be designed and explained in below steps:

  • We have to use radioisotopes to track the oxygen flow in plants.
  • Use two groups of plants to undergo the process of photosynthesis.
  • Give the first group of plants, radioactively-labeled water along with unlabeled carbon dioxide.
  • Give the second group of plants , radioactively-labeled carbon dioxide along with unlabeled water.
  • Record the results :
  • We will find that :

Results:

  1. The oxygen that is released from the first group of plants will be  radioactive,thereby confirming that oxygen comes from water in photosynthesis.
  2. The oxygen released from the second group of plants will be unlabelled.

Conclusion :The oxygen of O2 comes from water and not carbon dioxide during the process of photosynthesis.

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