It then passes through nuclear pores into cytoplasm. Finally it attaches to ribosomes where the genetic message is translated into primary protein structure. Ribosome Are complexes of RNA and protein. A cytoplasmic organelle which is the site for protein synthesis. Constructed in the nucleolus in eukaryotic cells.
Ribosomes function either free in the cytosol or bound to endoplasmic reticulum.
Bound and free ribosomes are structurally identical and interchangeable. Ribosomes suspended in the cytosol. Most proteins made by free ribosomes will function in the cytosol. Ribosomes attached to the outside of the endoplasmic reticulum. Generally make proteins that are destined for membrane inclusion or export.