Nucleolus

by **Adz795** » Mon Sep 05, 2011 2:24 pm

Please tell me the significance of the nucleolus, besides the fact that it manufactures the ribosomal subunits.

-Why is it that the nucleolus appears very dark in transmission electron micrographs?
Does it have heterochromatin? Does it even have DNA?

Thanks.

by **JackBean** » Mon Sep 05, 2011 6:30 pm

I think it manufactures more kinds of RNA

by **Talcen** » Mon Sep 05, 2011 9:30 pm

The nucleous functions as the synthesizer and assembler of rRNA. The nucleolus, just like the rest of the nucleus, contains DNA. The heterochromatin surrounds the nucleolus. I do not know why the nucleolus appears dark in TEMs. I hope this helps.

by **greatmicrobiologist** » Wed Sep 07, 2011 7:29 am

Go through : http://en.wikipedia.org/wiki/Nucleolus# ... e_assembly :roll:

by **Adz795** » Wed Sep 07, 2011 11:34 am

Thank you everybody!
Your help is much appreciated.

Talcen, are you sure the nucleolus assembles the ribosomal subunits? I think that is done in the cytoplasm.

by **greatmicrobiologist** » Thu Sep 08, 2011 12:13 pm

Adz795 wrote:
Talcen, are you sure the nucleolus assembles the ribosomal subunits? I think that is done in the cytoplasm.

nucleolus does. .

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