UCSB Science Line
Sponge Spicules Nerve Cells Galaxy Abalone Shell Nickel Succinate X-ray Lens Lupine
UCSB Science Line
How it Works
Ask a Question
Search Topics
Our Scientists
Science Links
Contact Information
What is a nutrient or anything that comes from outside of the cell membrane, which does it go to the nucleus (even if it ends up like a waste)?
Question Date: 2013-09-26
Answer 1:

The nucleus of a cell is a double membrane that surrounding nuclear DNA, making it the control center of the cell. Nuclear pores regulate the transport of molecules into and out of the nucleus. These channels regulate the transport of large molecules while smaller molecules and ions can cross freely. RNA is an excelent example of a macromolecule that can leave the nucleus. Ions, such as sodium and chlorine ions, can cross freely, but only along a gradient. Ion concentration can also be regulated by ion channels.

Click Here to return to the search form.

University of California, Santa Barbara Materials Research Laboratory National Science Foundation
This program is co-sponsored by the National Science Foundation and UCSB School-University Partnerships
Copyright © 2020 The Regents of the University of California,
All Rights Reserved.
UCSB Terms of Use