AP BIOLOGY

Detailed explanation-1: -NADPH will travel to the Calvin cycle, where its electrons are used to build sugars from carbon dioxide. The other ingredient needed by the Calvin cycle is ATP, and this too is provided by the light reactions.

Detailed explanation-2: -The light-dependent reactions convert light energy into chemical energy. The goal of the light-dependent reactions of photosynthesis is to collect energy from the sun and break down water molecules to produce ATP and NADPH. These two energy-storing molecules are then used in the light-independent reactions.

Detailed explanation-3: -The sunlight is converted to chemical energy during these reactions. The chlorophyll in the plants absorb sunlight and transfers to the photosystem which are responsible for photosynthesis. Water is used to provide hydrogen ions and electrons but also produces oxygen.

Detailed explanation-4: -In the first part of photosynthesis, the light-dependent reaction, pigment molecules absorb energy from sunlight. The most common and abundant pigment is chlorophyll a.

Detailed explanation-5: -The light-dependent reactions use ATP from the Calvin cycle, and the Calvin cycle uses energy from absorbed sunlight. The light-dependent reactions take place in the thylakoid membrane, and the Calvin cycle takes place in the stroma.