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Photosynthesis in Higher Plants — BIOLOGY STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceBIOLOGYPhotosynthesis in Higher Plants3 Marks
Question
A cyclic process is occurring in $\mathrm{C}_3$ plant, which is light dependent, and needs $\mathrm{O}_2$. This process doesn’t produce energy rather it consumes energy.
  1. Can you name the given process?
  2. Is it essential for survival?
  3. What are the end products of this process?
  4. Where does it occur?
✓

Answer

  1. Photorespiration is the light dependent process of oxygenation of ribulose biphosphate (RuBP) and release of carbon dioxide by the photosynthetic organs of plant.
  2. Photorespiration does not produce energy or reducing power, rather it consumes energy. Further, it undoes the work of photosynthesis. Therefore, photorespiration is a highly wasteful process. It is not essential for survival.
  3. The end product of this process is phosphogly cerate.
  4. The site of photorespiration is chloroplast whereas; peroxisome and mitochondria are required for completing the process.

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