2.3.6 Gene Expression Flashcards
0
Q
Why do cells become specialised?
A
Because only some genes are switched on and produce active mRNA which is translated into proteins within the cell
1
Q
What is the structure and function of each cell type dependant on?
A
The proteins that it synthesises
2
Q
What happens to beta galactosidase when lactose isn’t present?
A
A lactose repressor molecule binds to the DNA and prevents transcription
3
Q
What happens to beta galactosidase when lactose is present?
A
The repressor molecule is prevented from binding to the DNA and the gene is exposed
4
Q
What is FOP?
A
Genes are expressed that produce all the proteins needed to become a specialised bone cell. White blood cells cause muscle to express other genes, causing them to turn into bone
