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

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

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Cell Signalling and Transduction
When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .

signaling molecule; receptor; G proteins
signaling molecule; target cell; G proteins
kinase; receptor; proteases
signaling molecule; target cell; receptors

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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
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 signaling molecules
three distinct types based on the distance over which the signaling molecules act

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