DENDROLOGY

Detailed explanation-1: -The photon causes an electron in the chlorophyll to become “excited.” The energy given to the electron allows it to break free from an atom of the chlorophyll molecule. Chlorophyll is therefore said to “donate” an electron (Figure 5.12). To replace the electron in the chlorophyll, a molecule of water is split.

Detailed explanation-2: -A single photon of visible light carries sufficient energy to cleave water’s hydrogen molecule ( H2) from its oxygen counterpart.

Detailed explanation-3: -The splitting of water molecules is called photolysis of water. During the light reaction of photosynthesis, the absorption of light by the chlorophyll results in the loss of the electron from it. In order to fulfill the electron requirement, the water molecule splits and donates the electron to the chlorophyll.

Detailed explanation-4: -Total 8 photons are required for evolving one molecule of oxygen and this is known as quantum requirement. For the liberation of one oxygen molecule, there must be involvement of 2 water molecules. These water molecules can liberate 4 electrons, 4 protons and a molecule of oxygen.

Detailed explanation-5: -Photolysis is the process of splitting of water molecules in the presence of grana and temperature.