The nucleus is the most obvious organelle in a eukaryotic cell. Virtually all eukaryote cells have a nucleus (red blood cells lose theirs and so are enucleate for most of their life-span of 180 days). It is surrounded by the nuclear envelope, a double membrane with contains a large number of pores. Molecules enter and leave the nucleus by these pores. The two lipid bilayers of the double membrane are separated by a gap of 20 to 40 …showed first 75 words of 673 total…

…showed last 75 words of 673 total…translation. You can find out more about translation in the section on protein synthesis. The Golgi body is a cell organelle found in eukaryotic cells. It is a stack of flattened, membranous sacs which is associated with the endoplasmic reticulum - the network of membranes in the cell that are the site of protein synthesis. The Golgi body modifies proteins and fats by, for example, sticking sugar molecules onto them to form glycoproteins and glycolipids.