Photosynthesis: Light Dependent Reactions

Flashcards reviewing key concepts regarding the light dependent reactions of photosynthesis.

The light dependent reactions of photosynthesis take place in the __ membrane.

thylakoid

In the light dependent reactions, water serves as a source of __.

electrons

During the light dependent reactions, the energy from light is used to store energy in the form of and .

ATP; NADPH

The process of transferring electrons from a high energy state to a lower energy state allows for the pumping of __ ions across the membrane.

hydrogen (H+)

The pigment involved in absorbing light at 680 nanometers is called __.

P680

After P680 donates its excited electron, it becomes __, making it a strong oxidizing agent.

P680+

Water is oxidized by P680+ to produce and ions.

oxygen; hydrogen (H+) ions

The first photosystem to be discovered, which absorbs light at 700 nanometers, is called __.

Photosystem I (P700)

In Photosystem I, the excited electron is used to reduce into .

NAD+; NADPH

The concentration gradient of hydrogen ions created during the light dependent reactions is utilized by __ to produce ATP from ADP.

ATP synthase