A biology problem?

A cell, Bastilla, has a semi-permeable membrane. By default all material entering the cell has to go through one tubule which pierces the cell wall, and anything and everything can drift out through the cell walls, including waste. Material which comes down the tubule is tagged by a special organelle at the tubule's base, which attaches a protein so that these extra-organism messages can be easily distinguished from internal work (They are green). Bastilla has some worker organelles, some internal plumbing (endoplasmic reticulum, cytoskeleton, Golgi body, mitochondria, etc.) and of course, a nucleus, where most of the important work starts with RNA, DNA, and proteins. Bastilla has no chloroplasts, in case you were wondering.
( Read on? )

Ed. note: And I did all of this, and the had to go to Wikipedia to get endoplasmic reticulum, since I just couldn't quite remember it. While there I grabbed cytoskeleton and Golgi body. It's been an awful long time since 9th Grade Biology. I'd say it's quite possible some of this stuff has been discovered and/or named since then, in uh 1991 ?