AP BIOLOGY

Detailed explanation-1: -Answer and Explanation: The gas released during the light reactions of photosynthesis is oxygen.

Detailed explanation-2: -In the light-dependent reactions, which take place at the thylakoid membrane, chlorophyll absorbs energy from sunlight and then converts it into chemical energy with the use of water. The light-dependent reactions release oxygen as a byproduct as water is broken apart.

Detailed explanation-3: -Essentially, oxygen is a waste product of the light reactions of photosynthesis. It is a ‘’leftover” from a necessary part of the process. All the oxygen that is necessary to maintain most forms of life just happens to come about during this process.

Detailed explanation-4: -The light reaction traps the energy from the sun and converts it into chemical energy that is stored in NADPH and ATP. Oxygen is released as the waste product.

Detailed explanation-5: -Oxygen (O2) is evolved during photosynthetic electron transport when water is split by the oxygen-evolving complex to provide protons and electrons to the chloroplastic electron chain, thereby generating ATP and NADPH-the energy source and reducing power for plant metabolism.