Nucleus Flashcards
function of the nucleus
- storage, replication and repair of genetic material
- expression of genetic material (transcription, splicing)
- ribosome biosynthesis
describe the structure of the nuclear envelope (basic)
- nuclear membrane
- nuclear pores
- nuclear lamina
what are the contents of the nucleus
- chromatin
- nucleoplasm
- nucleolus
describe the layers of the nuclear envelope
2 parallel phospholipid bilayers
outer nuclear membrane ______ ribosomes and is ______ with rough ER
outer nuclear membrane binds ribosomes and is continuous with rough er
inner nuclear membrane has ______ proteins, and connects to ____
the inner nuclear membrane has integral proteins and connects to nuclear lamina
the nuclear envelope ___ nuclear content from cytoplasm
the nuclear envelope separates nuclear content from cytoplasm
the nuclear envelope allows what between nucleus and cytoplasm
the nuclear envelope allows movement of molecules between nucleus and cytoplasm
what supports the nuclear envelope
the nuclear lamina
what is nuclear lamina
thick meshwork of filamentous proteins
what are lamina
class v intermediate filaments
do plants have nuclear lamina
yes plants have nuclear lamina but they do not have lamina proteins
what binds nuclear lamina with the membrane of the nuclear envelope
nuclear lamina is bound to inner membrane of nuclear envelope by integral membrane proteins
how many pores are there on each nucleus
3000-4000
what is the nuclear pore complex composed of
nucleoporins
