Describe the structure and function of the following: cell wall, cell membrane, Nucleus, chromatin,nucleolus,?

Answer 1

The Nucleus: contains the genes of the cell. Its size is about 5um. in diameter. It is surrounded by a lipid bilayer perforated with pores. There is a 20-40 nm. space between the layers of the membrane.
Chromosomes are rod shaped structures containing DNA and protein. Chromosomes are usually broken down into chromatin. The Nucleolus is also found in the nucleus. It produces ribosomes at a rate of 10,000 / min. The nucleus controls the cell's functioning through the production of m-RNA.

Cell Wall: From the cell membrane out the cell wall is as follows: Primary wall, secondary wall, and a sticky area between adjacent cells called the middle lamella. In animal cells a fuzzy coat called the glycocalyx is found. This is made of sticky oligosaccharides that act as glue to keep the cells together.

Answer 2

there it is (and much more):
http://www.cellsalive.com/cells/cell_model.htm