Which Organelle Does Photosynthesis Occur In, And Why?

Answer: Photosynthesis primarily occurs in chloroplasts, specialized organelles found within plant cells.


Chloroplasts contain membranes stacked in flattened sacs called thylakoids, where light-dependent reactions capture light energy and convert it to ATP and NADPH. The stroma, the fluid-filled region surrounding the thylakoids, houses enzymes for the light-independent Calvin cycle, where CO2 is fixed into organic molecules using ATP and NADPH generated in the light reactions.

Chloroplasts are essentially miniature “energy factories” within plant cells, essential for converting sunlight into usable energy and organic compounds.

Related Articles