1. Tardigrade
  2. Question
  3. Biology
  4. The electrons, that are removed from photosystem-II and photosystem-I during z-scheme, must be replaced. This is achieved by electrons released

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. The electrons, that are removed from photosystem-II and photosystem-I during z-scheme, must be replaced. This is achieved by electrons released

NTA AbhyasNTA Abhyas 2020Photosynthesis in Higher Plants

Solution:

Photosystem II is associated with oxygen-evolving complex - that has 4 Mg ions, one calcium ion and one chlorine ion - that splits water molecules to 4H+ and O2. Hence photosystem II obtain electron by splitting of water.
Photosystem I gets an electron from photosystem II. This Z-scheme is also called cyclic photophosphorylation.