noun
- stacks of flattened membrane sacs (thylakoids) within chloroplasts where photosynthesis occurs
- plural form of granum
Usage: biology; botany
Usage: technical
Examples
- The grana contain chlorophyll and are the sites of light-dependent reactions.
- Electron microscopy revealed the detailed structure of the grana.
- Each chloroplast contains multiple grana connected by stromal lamellae.
- The grana appear as dark green stacks under high magnification.
- Photosystem II is located primarily in the grana thylakoids.
- The number of grana per chloroplast varies among different plant species.