Question

why is photolysis of water accompanied with non cyclic photophosphorylation?​

Answer 1

Answer:

In a process called non-cyclic photophosphorylation (the "standard" form of the light-dependent reactions), electrons are removed from water and passed through PSII and PSI before ending up in NADPH. This process requires light to be absorbed twice, once in each photosystem, and it makes ATP.

Explanation:

Being a light reaction, non-cyclic photophosphorylation occurs in the thylakoid membrane. First, a water molecule is broken down into 2H+ + 1/2 O2 + 2e− by a process called photolysis (or light-splitting). ... The deficit of electrons is replenished by taking electrons from another molecule of water.

In non-cyclic photophosphorylation 1 ATP and 2 NADPH2 molecules are produced. In cyclic photophosphorylation 2 ATP molecules are produced.

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