Where does the oxygen during photosynthesis come from? - ProProfs Discuss
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Where does the oxygen during photosynthesis come from?



A. Splitting of water molecules
B. Splitting of carbon dioxide molecules
C. Formation of ATP
D. Formation of glucose
E. Combination of oxygen atoms and high-energy electrons

This question is part of Honors Biology Photosynthesis Quiz
Asked by Jweeast, Last updated: May 01, 2018

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3 Answers

C.Mila

C.Mila

Answered on May 01, 2018

The oxygen during photosynthesis comes from split water molecules. During photosynthesis, the plant absorbs water and carbon dioxide. After the absorption, the water molecules are disassembled and converted into sugar and oxygen. The water molecules are also split into oxygen and hydrogen and the latter (hydrogen) is joined to the carbon dioxide to create sugars. Excess oxygen gathered after all these are released into the atmosphere during respiration.

In another regard, plants take in carbon dioxide (CO2) and water (H2O) during photosynthesis. The Chlorophyll in the leaves absorb sunlight and the water and carbon dioxide are used for making sugar. This sugar is stored for energy. Excess sugar is left behind in the root to work as starch and the excess water and carbon dioxide will evaporate.

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abdi

Abdi

Answered on Oct 27, 2017

The oxygen released during photosynthesis comes from thesplitting of waterduringthe light-dependent reaction. 3. Remember, the electrons lost from the reaction center in photosystem II must be replaced.

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John Smith

John Smith

Answered on Jun 01, 2017

Splitting of water molecules
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