THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The signal is transduced through the plasma membrane into the cell.
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The cell surface receptor denatures.
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The receptor relays a signal to another location of the cell surface.
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Polarization of the cell surface changes.
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The cell surface receptor flips through the membrane to the inside of the cell.
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Detailed explanation-1: -The ligand crosses the plasma membrane and binds to the receptor in the cytoplasm. The receptor then moves to the nucleus, where it binds DNA to regulate transcription.
Detailed explanation-2: -When a ligand binds to a cell-surface receptor, the receptor’s intracellular domain (part inside the cell) changes in some way. Generally, it takes on a new shape, which may make it active as an enzyme or let it bind other molecules. The change in the receptor sets off a series of signaling events.
Detailed explanation-3: -What is the response of a receptor to the binding of a ligand to it at the cell’s extracellular surface? Option A: The receptor relays a signal across the membrane to the receptor’s cytoplasmic domain at the inner membrane surface.
Detailed explanation-4: -The largest family of cell surface receptors transmit signals to intracellular targets via the intermediary action of guanine nucleotide-binding proteins called G proteins.
Detailed explanation-5: -Gated ion channels form a pore through the plasma membrane that opens when the signaling molecule binds. The open pore then allows ions to flow into or out of the cell. Ion channel-linked receptors bind a ligand and open a channel through the membrane that allows specific ions to pass through.