MCQ
The oxygen liberated during the photosynthesis comes from
- A$CO_2$
- ✓Water
- CPhotosynthetic enzymes
- DCarbohydrates
When a photon of light strikes the reaction centre of $PS$ $II$, it emites an electron. Two $H _{2} O$ molecules bind to an enzyme at reaction centre and enzyme splits the water and $H ^{+}$are released in the lumen and also $O _{2}$ is produced.
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