in this example). Protein kinases can enter the nucleus and affect transcription. Chemical signals are continually bombarding cell. Learn how the binding of a signal to cell receptors initiates a ...

This is one more example of the kind of sloppy, careless, incompetent behavior, particularly toward classified information,’ ...

Most cell signals are chemical in nature. For example, prokaryotic organisms have sensors that detect nutrients and help them navigate toward food sources. In multicellular organisms, growth ...