Cell Signalling and Transduction
A signal cascade induced by adrenaline or thyroxine

results in the activation of a sequence of enzymes needed for the cell effect
All of these
must begin with receipt of the signal molecule by a surface receptor
involves the activation of a G protein

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Cell Signalling and Transduction
A cell is known to respond to a particular signaling molecule. Which of the following must be true of this cell?

It contains the receptor for the signaling molecule
It is in the heart muscle
It is also the site of production for the signaling molecule
It is incapable of signal transduction

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Cell Signalling and Transduction
Which of the following is true about a hydrophilic signaling molecule?

Its receptor is located in the cytosol of the target cell
It might trigger a signal cascade that causes some effect in a cell
It is a steroid
Since it can enter the cell, it directly affects some specific cell process

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