Which of the following best describes cell communication processes that occur wh

Question

Which of the following best describes cell communication processes that occur when a cell detects a signaling molecule?

The cell produces hormones that convert the molecule to an electric signal that is detected by relay molecules.

The cell releases an enzyme that binds the molecule to receptors, allowing the molecule to enter the cell.

The molecule binds to a receptor protein, which changes the protein and triggers signal transduction.

The molecule enters the cell through an ion channel and activates a cellular response by inhibiting transduction.

Explanation / Answer

The molecule binds to a receptor protein, which changes the protein and triggers signal transduction.

The signalling molecule binds to its cognate receptor protein and induces a conformational change or changes the phosphorylation state of the receptor protein. This change in receptors proteins lead to activation of downstream components to initiate a signalling cascade which can either cause non-genomic or genomic responses (transcription of genes).

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