Cell Signalling and Transduction
Which of the following comes under the category of cell surface receptor?

Ion-channel linked receptors
All of these
G protein linked receptors
Enzyme linked receptors

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Cell Signalling and Transduction
In the signal transduction mechanism known as protein phosphorylation

receptor kinases play a key role in triggering the signal cascade
the signaling molecule binds to a surface receptor
phosphorylated proteins act with enzymes to trigger the signal cascade
All of these

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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 incapable of signal transduction
It is also the site of production for the signaling molecule

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

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

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