Thylakoids

Definition

Thylakoids are flattened sac-like membranes arranged in stacks (grana) inside the chloroplasts. They contain chlorophyll and play a crucial role in capturing light energy and converting it into chemical energy during photosynthesis.

Related terms

Photosystems:

Clusters of pigments and proteins that capture light energy within thylakoid membranes.

Electron Transport Chain:

A series of protein complexes embedded in the thylakoid membrane that transfer electrons during the light reactions of photosynthesis.

ATP Synthase: An enzyme located in the thylakoid membrane that uses the energy from flowing protons to synthesize ATP.