what are the 3 mechanisms by which RTKs can activate signali

what are the 3 mechanisms by which RTKs can activate signaling enzymes?

The three mechanisms are:

1.Signal transmission where the signal is sent to to activate the enzyme.

2.Subcellular localization where cells are divided into sub cells and localized to activate enzyme

3.Ligand binding :The ligand is attached to the DNA to activate enzyme.