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STD 11 - 11. photosynthesis in higher plants — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 11. photosynthesis in higher plants1 Mark
MCQ
The oxygen liberated during the photosynthesis comes from
  • A
    $CO_2$
  • ✓
    Water
  • C
    Photosynthetic enzymes
  • D
    Carbohydrates
✓

Answer

Correct option: B.
Water
b
$H _{2} O \rightarrow H ^{+}+ O _{2}$

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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