Nucleus: A membrane-sure organelle that houses the cell’s DNA, organized into linear chromosomes affiliated with histone proteins. Encased through the nuclear envelope, the nucleus assures the DNA’s safety from potential external threats. Within the nucleus, the nucleolus is liable for assembling ribosome subunits. Different types of cell have cell walls https://maps.app.goo.gl/UmD5JM5ww6NgkMzV9