Multiple choice

The acetylcholine receptor at the nerve-muscle junction is an example of

  1. intracellular receptor

  2. tyrosine kinase-linked receptor

  3. G protein-coupled receptor

  4. ion channel receptor

  5. receptors with intrinsic enzymatic activity
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D Correct answer
Explanation

The acetylcholine receptor at the nerve- muscle junction is an example of ion-channel receptors. The binding of ligand changes the conformation of the receptor that allows flow of specific ions through it. The ion movement thus alters the electric potential across the membrane.

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