BRAINCAKEEndoplasmic Reticulum
The endoplasmic reticulum is a network of membranes surrounding flattened membranous sacs called cisternae.
The rough endoplasmic reticulum is continuous with the outer membrane of the nuclear envelope and has ribosomes attached. . The rough ER is the site of protein synthesis.
Newly formed proteins are packaged in vesicles and transported to other parts of the cell such as the Golgi apparatus.
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Key terms in this lesson
- Golgi apparatus
- A stack of membrane-bound sacs that modifies, packages and transports proteins and lipids, forming secretory vesicles and lysosomes.
- ribosome
- A small organelle, made of RNA and protein, that is the site of protein synthesis.
More in Cell Structure
- Scanning Electron Microscope
- The Nucleus
- Mitochondria
- Chloroplasts
- Golgi Apparatus
- Lysosomes
- Ribosomes
- Cell Wall
All 26 lessons in Cell Structure · All AQA AS-level Biology topics