Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Chapter 10.1, Problem 2R
Summary Introduction
To review:
The experimental evidence that water is the source of the oxygen (O2) produced during photosynthesis.
Introduction:
The process of photosynthesis includes carbon reduction. This process requires a hydrogen or electron donor for reducing the CO2 (carbon dioxide). In plants, water is the main source of hydrogen and acts as a hydrogen donor. Therefore, the reduction of CO2 involves hydrogen water and release of oxygen as a byproduct. This process is known as photolysis of water. This has proved experimentally by using heavy isotopes.
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Life: The Science of Biology
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