D Question 4 2 pts Place the following events in the correct order in a G-protei
ID: 196024 • Letter: D
Question
D Question 4 2 pts Place the following events in the correct order in a G-protein linked receptor A signal molecule attches to the receptor protein Fourth Third First The receptor protein activates a G-protein Second The G-protein moves along the cell membrane (Choose) The G-protein activates an effector protein I Choose l D Question 5 1 pts In autocrine cell signaling, a cell would release a signal molecule that attaches to an)-.. located on O receptor protein; a nearby ce O receptor protein a far away ces O recephor protein: sel O effector proteina nearby ce O effector protcin; itsei O effector protein(# far away cdExplanation / Answer
G proteins relay their signal on the inside surface of the cell membrane.
The process starts when a receptor binds to its signal molecule such as adrenaline.
This changes the shape of the receptor, and it binds to the inactive three-chain G protein inside.
This causes the G protein to expel its GDP molecule and replace it with GTP. The GTP causes the subunits to change shape, and the G protein falls into two pieces. The freed alpha subunit, with its bound GTP, then moves along the membrane until it finds the enzyme adenylyl cyclase.
The G protein subunit then binds to the enzyme and activates it.
Autocrine signaling is a form of cell signaling in which the signaling molecules produce an effect on same cell that produces it. The cell secretes a hormone or chemical messenger (called the autocrine agent) that binds to autocrine receptors on that same cell, leading to changes in the cell.
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