PACKAGING OF DNA HELIX Flashcards
1
Q
basic structural and functional unit of chromatin
A
nucleosome
2
Q
nucleosome has
A
dna
histone octamer
H1
3
Q
histones are rich in
A
amino acid residues lysine and argenine
(carry+ve charge in side chain)
4
Q
1 nucleosome has how many bp
A
200 bp
5
Q
packaging of chromatin at higher levels require
A
non-histone chromosomal (NHC) protiens
6
Q
phases of dna packaging
A
euchromatin
heterochromatin
chromatin fibres
chromosomes
7
Q
differentiate eu and hetero chromatin
A
eu : transcriptionally active, loosely packed, stains light
hetero : transcriptionally inactive, densly packed, stains dark
