AP BIOLOGY

Detailed explanation-1: -Photophosphorylation is the conversion of ADP to ATP using the energy of sunlight by activation of PSII. This involves the splitting of the water molecule in oxygen and hydrogen protons (H+), a process known as photolysis. Subsequently, a continuous unidirectional flow of electron from water to PSI is performed (Fig.

Detailed explanation-2: -photolysis, chemical process by which molecules are broken down into smaller units through the absorption of light. The best-known example of a photolytic process is the experimental technique known as flash photolysis, employed in the study of short-lived chemical intermediates formed in many photochemical reactions.

Detailed explanation-3: -During the light reaction, light energy is utilized. By using light energy, water is split to form oxygen, and hydrogen and electron are released. This is known as the photolysis of water. Water acts as a reducing agent that provides H+ ions and it converts NADP to NADPH.

Detailed explanation-4: -Photolysis of water occurs in the presence of sunlight and breakdown water into hydrogen and oxygen.

Detailed explanation-5: -The high-energy electron is passed to an acceptor molecule and replaced with an electron from water.