Which of the following type of oxygen gas will be released on providing heavy water (H2O18) to a photosynthetic system?
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a
Oxygen gas containing O18 atoms
b
Oxygen gas containing O16 atoms
c
Oxygen gas containing O32 atoms
d
Oxygen gas containing O64 atoms
answer is A.
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Detailed Solution
During photosynthesis, water molecules undergo photolysis and release oxygen gas, electrons and protons in the thylakoid lumen. When water molecules provided in the medium are heavy then released oxygen will also be heavy (O18).