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

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP

Cell Signalling and Transduction
cAMP and cGMP are derived from

None of these
ATP and GTP by the actions of adenylate cyclase and guanylate cyclase respectively
ATP and GTP by the actions of guanylate cyclase and adenylate cyclase respectively
GTP and ATP by the actions of adenylate cyclase and guanylate cyclase respectively

ANSWER DOWNLOAD EXAMIANS APP

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

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

ANSWER DOWNLOAD EXAMIANS APP

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

ANSWER DOWNLOAD EXAMIANS APP