ORGANELLE DIAGRAM: RIBOSOMES:
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.
Such membrane-bound ribosomes impart a beaded (rough) appearance to endoplasmic reticulum when it is inspected by an electron microscope.
SUMMARY
name(s): bound ribosomes, attached ribosomes
location: the outer (cytosol) surface of the rough endoplasmic reticulum.
appearance: approximately spherical bodies often arranged in strings or spirals (because they are strung together by messenger RNA).
Subscribe to our news feed to learn about new graphics, new products, and other news!
