when an electron is admitted from photosystem to it does not return the photosystem cannot trap any more light energy until the “hole” in the photosystem is filled with another electron the source of the electron that fills the “hole” in photosystem 2 is it water

Answer 1

. The source of the electron that fills the "hole" in photosystem 2 is indeed water. During the light-dependent reactions of photosynthesis, water molecules are split by the enzyme complex known as the water-splitting enzyme. This results in the release of oxygen molecules and electrons that are used to replace the electrons that were excited and lost by photosystem 2. The oxygen molecules produced during this process are released as a byproduct of photosynthesis.