THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A. Most receptors exhibit ligand specificity.
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Ligand-receptor interactions are reversible
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Ligand-receptor interactions are reversible
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Ligand-receptor complexes are most often formed in cell communication pathways in which participating cells are in direct contact
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Detailed explanation-1: -A protein–ligand complex is a complex of a protein bound with a ligand that is formed following molecular recognition between proteins that interact with each other or with various other molecules.
Detailed explanation-2: -Ion Channel Receptors When a ligand binds an ion channel receptor, a channel through the plasma membrane opens that allows specific ions to pass through. This process requires a specialized membrane-spanning region of the receptor.
Detailed explanation-3: -Agonists are drugs with both affinity (they bind to the target receptor) and intrinsic efficacy (they change receptor activity to produce a response). Antagonists have affinity but zero intrinsic efficacy; therefore they bind to the target receptor but do not produce a response.
Detailed explanation-4: -Cell-surface receptors. Cell-surface receptors are membrane-anchored proteins that bind to ligands on the outside surface of the cell.