gene expression Flashcards
1
Q
how is DNA packaged?
A
into nucleosomes
2
Q
what is the structure of nucleosomes?
A
beads on a string
3
Q
what is the core of a nucleosome called?
A
ochtistome
4
Q
how is the DNA string packaged?
A
10nm fibre into a 30nm , possible 100nm but not yet been shown
5
Q
which histone is important for packaging of DNA?
A
histone H1
6
Q
three things in the makeup of a gene?
A
regulatory sequences
introns
exons
7
Q
what do chromosomes have during interphase?
A
their own territories
8
Q
what may DNA form?
A
fractal globules
9
Q
4 features of codons?
A
triplet code for flow of info
dont overlap but no spaces between
transcribed into complementary DNA
this translated into amino acids
10
Q
difference between RNA and DNA?
A
single/double stranded
backbones contains ribose/deoxyribose
uracil/thymine
11
Q
5 Types of RNA?
A
rRNA tRNA mRNA hRNA/pre-mRNA LNC RNA
