If a photosynthesizing organism is provided carbon dioxide that contains heavy oxygen (18O), all of the following molecules would be expected to contain 18O EXCEPT

Question

anonymous · Answer

glucose (C6H12O6)

 glyceraldehyde-3-phosphate (G3P)

 oxygen (O2)

 3-phosphoglycerate

anonymous · Answer

The answer here is O2. 

The products of photosynthesis are Glucose and Oxygen. You know that, right? 

If heavy oxygen is in the reactants, 
then heavy oxygen will be in products, 
all EXCEPT for O2, which is just Oxygen. 

It's just one of those things we need to remember.

anonymous · Answer

Thank you very much!