(Multiple Choice Question): When a ligand attaches to a receptor, which of the f

Question

(Multiple Choice Question):

When a ligand attaches to a receptor, which of the following occurs first? (Consider a ligand to be a hormone or a cell messenger)

A) There is a change in shape of the ligand which causes the signaling cascade

B) There is a change in shape of the receptor which triggers the stopping of the signaling cascade

C) There is a change in shape of the receptor which triggers the beginning of the signaling cascade

D) There is a change in shape of the receptor which causes the ligand to be released

Explanation / Answer

The answer is

C) There is a change in shape of the receptor which triggers the beginning of the signaling cascade

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