Q.

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).
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