Grana are stacks of thylakoids (disc-shaped structures) within the chloroplasts where light-dependent reactions of photosynthesis occur.
Thylakoid Membrane: The site within the chloroplast where light-dependent reactions occur; each granum consists of multiple stacked thylakoids.
Organelles found in plant cells and eukaryotic algae that conduct photosynthesis.
The first stage of photosynthesis occurring in the thylakoid membranes where solar energy is converted into chemical energy.