Zeb1 encodes a transcription factor that activates expression of genes that help cells migrate (move to different parts of the body) during embryogenesis. Zeb1 is not expressed in most adult tissues, but can undergo a gain of function mutation in some tumors. Which change is likely to result from a gain of function mutation in Zeb1? a) sustaining proliferative signalling O b) activating invasion and metastasis O c) deregulating cellular energetics O d) resisting cell death

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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.