SME
Cell & Molecular Biology · Problem type
A G-protein pathway in order
Use this for “Put these in order: cAMP is made, the hormone binds, PKA is switched on, the G protein takes GTP.”
Put in order
Put the steps in order, from the hormone arriving.
1
?
2
?
3
?
4
?
5
?
6
?
7
?
Assumptions
•
The pathway is the cAMP one, as in a liver cell answering adrenaline with a G-protein-coupled receptor.
•
The times are rough, to show the scale: the whole response takes about a minute or two.
•
Shut-off starts as soon as the G protein is on; it is placed last because it ends the signal.
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