Which of the following mutations in a gene encoding a transmembrane receptor protein is most likely to create an allele that is completely dominant to a wild type allele? A missense mutation causing the receptor to be active in the absence of ligands that would normally be needed to activate it A missense mutation reducing the signaling capabilities of the receptor A deletion of the binding site for a transcription factor that activates expression of the gene A deletion of the entire coding region

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Cell Signaling

It allows cells to perform various cellular activities, coordinate, and interact with other cells. All cells of an organism receive signals from their environments and respond accordingly. Even the unicellular eukaryotes receive signals secreted by other cells and respond. In the case of yeast, mating takes place by signaling between the yeast cells. Communication by cell signaling in a multicellular organism has become a vast and important part of various fields of biology.