If photosynthesizing green algae are provided with CO2 ...

[Jesse_J]

If photosynthesizing green algae are provided with CO2 synthesized with heavy oxygen (18O), later analysis will show that all but one of the following compounds produced by the algae contain the 18O label. That one is
A) 3-phosphoglycerate.
B) glyceraldehyde 3-phosphate (G3P).
C) glucose.
D) ribulose bisphosphate (RuBP).
E) O2.

[aero]

I picked E and I got it right, good luck

[Jesse_J]

Thanks so much, perfect.