Cell Organelles: Bound ribosomes

/Home//Cytoplasm & Organelles/Ribosomes

Cell Organelles: Bound ribosomes
By Russell Kightley Media

In this picture, ribosomes are the pale yellow bead-like objects that are attached to the exterior (cytoplasmic side) of the rough endoplasmic reticulum. These ribosomes are busy with protein synthesis. Stringing them together is messenger RNA which directs protein manufacture as it passes through the ribosomes. The growing proteins project into the cavity (lumen) of the rough ER. Other ribosomes are free in the cytoplasm.