Which of the following is an example of specificity in G protein-coupled receptor signalling?

Question

Which of the following is an example of  specificity  in G protein-coupled receptor signalling?

Answer

Ligand activation of adenosine receptor and adrenoreceptor gives rise to similar G-protein activation and downstream signalling pathways

Answer

Delta-type opioid receptor binds to either endomorphin-1 or dynorphin B, initiating the same intracellular signalling pathway

Answer

Adenosine receptor binds to adenosine, initiating an intracellular signalling pathway, but it does not bind or respond to dopamine

Answer

Adrenoreceptor binds to either adrenaline or noradrenaline, initiating the same intracellular signalling pathway

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