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Which type of cell-surface receptor undergoes changes in phosphorylation in response to binding of its ligand?A)G protein–coupled receptorB)receptor kinaseC)ligand-gated ion channelD)both the G protein–coupled receptor and the receptor kinase

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Answer:

Letter A. G-protein coupled receptor

Explanation:

G protein-coupled receptors are a large protein family of transmembrane receptors that pick up extracellular signals and activate signal transduction pathways within the cell. They start this transduction through a chain of events triggered by phosphorylation.

In this question, we may be confused by the options that involve protein kinase, but we have to consider only cell surface receptors, as the request in question.

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