The deficiency of which of these elements interrupts photolysis of water during photosynthesis?
- Mn and Cl
- Zn and Cu
- Ca and K
- N and P
The Correct Option is A
Approach Solution - 1
The photolysis of water during photosynthesis is a critical step in the light-dependent reactions, occurring in the oxygen-evolving complex (OEC) of Photosystem II. This process requires specific elements as cofactors. Manganese (Mn) is essential for the OEC's structure and function, while Chlorine (Cl) helps stabilize the manganese cluster and maintains ionic balance.
Thus, the correct answer is (A) Mn and Cl, as these elements are directly involved in the water-splitting reaction. Deficiencies in either Mn or Cl would disrupt the photolysis of water.
Approach Solution -2
The photolysis of water during photosynthesis is critically dependent on manganese (Mn) and chlorine (Cl). Manganese is a central component of the oxygen-evolving complex (OEC) in Photosystem II, where it directly participates in splitting water molecules to release oxygen. Chlorine stabilizes the OEC by maintaining the necessary ionic environment for this reaction. Deficiencies in either element disrupt the water-splitting process, halting oxygen production. Other elements like zinc, copper, or nitrogen, while important for other photosynthetic functions, do not directly influence photolysis.
Thus, the correct answer is (A) Mn and Cl
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