Early investigators thought the oxygen produced by photosynthetic plants came from carbon dioxide. In fact, it comes from A) H₂S. B) glucose. C) water. D) electrons from NADPH.

Question

Quizplus · Accepted Answer

The oxygen produced by photosynthetic plants actually comes from water, which is split during the light-dependent reactions of photosynthesis. This process, called photolysis, releases oxygen as a by-product. Carbon dioxide is used in the light-independent reactions of photosynthesis, but it does not directly produce oxygen.

Early Investigators Thought the Oxygen Produced by Photosynthetic Plants Came