Receptor proteins are primarily involved in signaling by receiving signals.

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Multiple Choice

Receptor proteins are primarily involved in signaling by receiving signals.

Signals are detected and acted upon inside cells through receptor proteins. These proteins are specialized to bind specific signaling molecules, or ligands, such as hormones or neurotransmitters. When a ligand binds, the receptor changes shape and triggers a cascade of intracellular events that convey the signal, often altering enzyme activity or gene expression. This receiver role is why receptor proteins are central to signaling. Enzymes, by contrast, mainly speed up chemical reactions rather than detect signals. Hormones are the signaling molecules themselves, not the receivers. Structural proteins provide shape and support and don’t typically sense signals.

Signals are detected and acted upon inside cells through receptor proteins. These proteins are specialized to bind specific signaling molecules, or ligands, such as hormones or neurotransmitters. When a ligand binds, the receptor changes shape and triggers a cascade of intracellular events that convey the signal, often altering enzyme activity or gene expression. This receiver role is why receptor proteins are central to signaling. Enzymes, by contrast, mainly speed up chemical reactions rather than detect signals. Hormones are the signaling molecules themselves, not the receivers. Structural proteins provide shape and support and don’t typically sense signals.

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