THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a plasma membrane receptor that works with the help of aG protein.
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a plasma membrane receptor that works with the help of aligand molecule.
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an internal receptor that works with the help of a G protein.
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an external receptor that works with the help of aligand molecule.
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Detailed explanation-1: -A G protein-coupled receptor is a plasma membrane receptor for the plant hormone abscisic acid. Science. 2007 Mar 23; 315(5819):1712-6.
Detailed explanation-2: -G protein-coupled receptors (GPCRs) mediate our sense of vision, smell, taste, and pain. They are also involved in cell recognition and communication processes, and hence have emerged as a prominent superfamily for drug targets.
Detailed explanation-3: -GPCRs are a large family of cell surface receptors that respond to a variety of external signals. Binding of a signaling molecule to a GPCR results in G protein activation, which in turn triggers the production of any number of second messengers.
Detailed explanation-4: -At the plasma-membrane, these proteins function as molecular switches that initiate and regulate multiple signal transduction pathways. Their fundamental role is in coupling external stimuli with cytoplasmic and nuclear targets, and their activation depends on their association with growth factor receptors.