3.9 Nucleus Flashcards
1
Q
Control center of cells; contains genetic material
A
Nucleus
2
Q
Double membrane barrier of a cell nucleus; encloses nucleoplasm
A
Nuclear envelope
3
Q
Dark-staining spherical bodies where the ribosomal subunits are assembled
A
Nucleoli
4
Q
Structures in the nucleus that carry the hereditary factors (genes)
- 30% DNA
- 60% histone proteins (package + regulate DNA)
- 10% RNA chains
A
Chromatin
5
Q
A strand of DNA wound around a cluster of eight histone proteins
A
Nucleosomes
6
Q
Bar-like bodies of tightly coiled chromatin; visible during cell division
A
Chromosomes
7
Q
Regulates transport of large molecules into and out of nucleus
A
Nuclear pore complex
