AP BIOLOGY

Detailed explanation-1: -During this process, the electrons in water are removed and passed to the reaction centre chlorophyll. The associated hydrogen ions are released from the water molecule, and after two water molecules are thus split, the oxygen atoms join to form molecular oxygen (O 2 ), a waste product of photosynthesis.

Detailed explanation-2: -In this process of photolysis (“splitting by light”), H2O molecules are broken into hydrogen ions, electrons, and oxygen atoms.

Detailed explanation-3: -Thus, the end products of the photolysis reaction are oxygen, NADPH and ATP.

Detailed explanation-4: -These reactions use photolysis, or the use of light energy to split water molecules and produce oxygen. In these light-dependent reactions, light energy is absorbed by chlorophyll and other pigments and transferred to the reaction center of photosystem II.

Detailed explanation-5: -The light energy is used to split water in a process called photolysis, which replaces electrons that have moved from photosystem II. The correct answer is (D). The electrons become excited and move to a higher energy level, leaving photosystem II.