EXAM 3. 1. functional domains of nucleus
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Created by:
-sophie on November 9, 2010
Subjects:
cellular and molecular biology
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23 terms
Terms | Definitions |
|---|---|
 Perinucleur space | Space between the inner and outer membrane of the nucleus |
| The E.R. is continuous with what part of the nucleus?? | Perinucleur space |
| The nucleur envelope is composed of how many double lipid bilayers? | 2 |
| What are the allegated channels in the nucleus called? | Nucleur Pore Complexes |
| What shapes and creates a place for the attachment of chromatin in the nucleus? | Nucleur Lamina |
| What kind of environment is the nucleus? | Aquaeous |
| Who proposed that each chromosome occupies a distinct territory within the nucleus? | Carl Rabl |
| What are polytene chromosomes? | Many copies (millions of them in interphase) |
| What kind of experimental method is used to visualize and identify chromosomes? | Fluorescence |
| When proteins are prepared for fluorescence, what has to be done before complementary molecules are sent in? | Denature the sample |
| What happens in the nucleolus? | rRNA transcription and processing (and ribosomal subunit assembly) |
| What kind of chromatin can be transcribed? | euchromatin |
| Where are these transcriptions taking place? | interchromosomal territorities for transcription because that is where the transcriptional machinery is located |
| What website should I review? | https://www.life.illinois.edu/mcb/150/private/faq/index.php?action=artikel&cat=11&id=178&artlang=en |
| What kind of chromatin is more dense? | Euchromatin |
| What are "speckles?" | clusters of transcription, replication, or repair machinery. (in nucleus) |
| Do chromosomes occupy their own space during interphase? | yes |
| What is one function of discrete functional domains in the nucleus? | Regulating gene expression |
| What are three distinct regions of the nucleolus? | the fibrillar centers (FC), the dense fibrillar component (DFC) and granular components (GC) |
| What is the NOR? | nucleolus organizer region (NOR) or nucleolar organizer is a chromosomal region around which the nucleolus forms |
| Process of rRNA | SNORs the rRNA and then assemble them |
| Fibrillar center | Of a nucleolus; contains DNA not undergoing transcription. |
| Dense fibrillar component | A component of the nucleolus that lacks granules and stains more intensely than other nucleolar components. |
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