lecture 10 Flashcards
what do the nuclear pores allow into the nucleus
control signals, macromolecules and energy move into the nucleus
what do the nuclear pores allow out of the nucleus
mRNA, tRNA and ribosomal subunits move out of nucleus
the outer membrane of the nucleus is continuous with what
the Endoplasmic reticulum
what does the nuclear lamina do?
maintain the shape of the nucleus, helps organise the packing of DNA within the nucleus
what do the nuclear pores regulate
nucleocytoplasmic exchange
what kind of cells us the nucleolus found in
A prominent nuclear
structure within nondividing cells
the nucleolus is what
a non membrane-bound region within the nucleus
what does the nucleolus do
it is Responsible for making
ribosomal RNA & ribosomal
subunits
DNA helix interacts with what to go from 2nm to 10nm
The helix interacts with proteins called Histones, 8 of them. 8 of them make what’s called a histone optima. The DNA wraps around an optima 1.67 times, which increases its diameter to 10nm.
10nm to 30nm involves what
reacts with another Histone, H1, which causes the nuclesome, DNA + histone proteins, to coil into rope like structure that makes DNA go from 10-30nm
what is the size flow chart of chromatin
2-10-30-300-metaphase chromosome
euchromatin and heterochromatin has a what
a dynamic relationship
