Some molecules are known as "signals" because they signal the beginning of certain cellular functions. In order for a signal to do its job though, it must bind to a specific "receptor" on the cells surface. What is the most critical factor in signal/receptor binding?

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    The shapes of both the signal and the receptor are critical.
    Both the signal and receptor must be composed of the same atoms.
    A signal must be an airborne molecule.
    Signals and receptors cannot be composed of the same kind of atoms.
asked May 30, 2013 in Biology by anonymous
    

1 Answer

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The shapes of both the signal and the receptor are critical.
answered May 31, 2013 by Bioshare ~Top Expert~ (34,070 points)

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