A hormone signal reaches a cell and causes the cell to produce a large quantity of Protein X. After some time, the hormone signal disappears and the cell no longer needs a large quantity of Protein X. How will the cell remove the excess protein?

The repressor protein for the Protein X gene will stop the transcription of the gene.

The excess Protein X will be tagged with ubiquitin proteins and degraded over time.

The Protein X mRNA will be bound by a microRNA blocking its translation.

Over time the excess Protein X will diffuse out of the cell.

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