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

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 11. photosynthesis in higher plants1 Mark
MCQ
What happen to the chloroplast pigment when they absorb light?
  • A
    They become reduced
  • ✓
    They become excited
  • C
    They lose potential energy
  • D
    Calvin cycle is triggered
✓

Answer

Correct option: B.
They become excited
b
Light reaction begins with the $PS-II$. In photosystem-$II$ the reaction centre chlorophyll-a absorb $680$ $nm$. wavelength of red light causing electrons to become excited and jump into orbit further from the nucleus. These electrons are picked up by an electron acceptor, which passes them to an electron system consisting of cytochromes

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