4.4: Changes in Signal Transduction Pathways

Question 1

What would happen if there was a mutation in the receptor protein?

Answer 1

It would not be able to bind to the ligand, so there would be no signal transduction.

Question 2

What would happen if there was a mutation in a transduction protein?

Answer 2

The signal would not be received.

Question 3

How can a chemical interfere with the signaling pathway?

Answer 3

They can bind to receptors, or prevent the signaling molecules from leaving.

Question 4

Identify one example of a chemical that activates a signaling pathway.

Answer 4

Fibroblast

Question 5

Identify one example of a chemical that inhibits a signaling pathway.

Answer 5

GABA