compartmentalisation of the cell

Question 1

Nuclear import

Answer 1

movement of proteins through the nuclear envelope/ pore into nucleus

Question 2

proteins targetted for nuclear import are marked/ have a signal
recognised by which receptor

Answer 2

Nuclear localisation signal
NLS
these are recognised by importins

Question 3

NES is used for, and recognised by what receptor

Answer 3

Export out of the nucleus
exportin

Question 4

Role of
Ran-GTP
Ran-GDP

Answer 4

GTP= nuclear export
GDP= nuclear import

Question 5

Mitochondria have 2 membranes, which complexes help import

Answer 5

TOM and TIM
outer and inner

Question 6

what signal do proteins carry to import into mitochondria

Answer 6

Mitochondrial targetting sequences
-translocase will let through

Question 7

BACTERIUM- what system helps export past the plasma membrane

Answer 7

Sec system
-proteins destined for secretion will be guided to the Sec complex by signal peptides

Question 8

what is cotranslational translocation

Answer 8

when an mRNA molecule is being translated by a membrane bound ribosome, the resultant protein will be released in the neighbouring membrane