Where does the hydrogen in glucose ultimately come from?

Answer 1

All elements were created in the big bang. All the protons and neutrons and electrons joined to form many different stable compounds. Carbon, hydrogen and oxygen are some of the most abundant of elements, but like to join onto other elements as well. This means it is very hard to obtain pure hydrogen.

Answer 2

the hydrogen molecules are separeted from the water molecules in the equation, and since the law of conservation of mass states that matter cannot be created or destroyed, the hydrogen is combined with the carbon and oxygen molecules to form glucose

Answer 3

The oxygen in Earth's atmosphere ultimately comes from carbon dioxide emitted by volcanoes. Cyanobacteria were the first organisms to carry our photosynthesis to convert water and carbon dioxide into sugar and oxygen. That oxygen has been in cycle ever since. The oxygen atoms that formed part of those carbon dioxide molecules originated from the nuclear furnaces of stars, as do all elements heavier than helium.

Answer 4

the oxygen and carbon come from the Carbon Dioxide in the Dark Reactions of Photosynthesis.

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Answer 5

Carbon atoms come from the CO2 we used in fixation stage of Calvin. Oxygen and Hydrogen atoms both come from water hydrolysis during Photosystem 2- Non Cyclic stage.