Photosynthesis Light Reactions Flashcard

Front

What is the byproduct of the reaction in which water splits and releases electrons in photosystem II?

Back

Oxygen

Front

What are the two protein-pigment complexes that absorb light in the thylakoid membranes?

Back

Photosystem I and Photosystem II

Front

What molecule stores some of the energy released from the transfer of electrons in the light reactions?

Back

NADPH

Front

Where do the protons released from the splitting of water accumulate?

Back

Lumen

Front

What enzyme uses the potential energy of the proton gradient to combine ADP with inorganic phosphate to form ATP?

Back

ATP synthase

Front

What is the primary function of photosystem II in the light reactions of photosynthesis?

Back

To absorb light energy and split water molecules, releasing oxygen and electrons.

Front

What role does chlorophyll play in photosynthesis?

Back

Chlorophyll absorbs light energy, primarily in the blue and red wavelengths, to drive the light reactions.

Front

What is the significance of the proton gradient created during the light reactions?

Back

The proton gradient is used by ATP synthase to produce ATP through chemiosmosis.

Front

What is the main purpose of the light reactions in photosynthesis?

Back

To convert light energy into chemical energy in the form of ATP and NADPH.

Front

How does NADP+ become NADPH during the light reactions?

Back

NADP+ accepts electrons and protons during the light reactions, becoming reduced to NADPH.