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What is the general chemical equation of photosynthesis? Why doesn't that equation clearly show the real origin of the molecular oxygen liberated?

BIOLOGY:CONCEPTS+APPL.(LOOSELEAF)

10th Edition

ISBN:9781305967359

Author:STARR

Publisher:STARR

Chapter20: The Protists

Section: Chapter Questions

Problem 4CT: Melvin Calvin and Andrew Benson determined the steps in the light-independent reactions of...

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Concept explainers

Photosynthesis

Plants have a capacity that we humans can only imagine— the ability to produce food from sunlight. Sure, we can prepare some dishes that we can savor on, but it become possible because of the plants (as they serve as a producers of all the raw materials required). Photosynthesis is the method of assembling carbohydrates with the aid of sunlight.

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Excited electrons (and hydrogen ions) in Photosystem 2 go through an electron transport system, but these electrons (and hydrogen ions) must be replaced in the pigments. How are these electrons (and hydrogen ions) replaced? In other words, what is the ultimate origin of these electrons (and hydrogen ions) and what is the important byproduct of the reaction that provides these electrons (and hydrogen ions)?
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