Part of your job would entail sorting through everything, finding the correct blueprints, copying them, and sending the copies out to the assembly line at the correct time. To prepare for this, you have to provide the new factory with its own set of all the blueprints. Now you may have a better appreciation for what the nucleus does in the cell. The nuclear membrane contains the blueprints of the cell. The information for the manufacture of proteins is encoded in a series of bases along the DNA found in the nucleus.
All cells contain much more DNA than they actually use.
Just as outdated blueprints in a factory are kept on file, outdated genetic information is never thrown out. When a cell has grown to a certain size it becomes less efficient. This ensures that every new cell has a correct and complete set of DNA blueprints. Nucleus Structure DNA transcription into mRNA occurs in the nucleus. The nucleus is composed of a nuclear membrane and nucleoplasm.