Cell Signalling and Transduction
Cell signaling can be classified into

None of these
two distinct types based on the distance over which the signaling molecules act
three distinct types based on the distance over which the signaling molecules act
three distinct types based on the signaling molecules

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

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

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

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