THE CELL
CELL COMMUNICATION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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a metabolic pathway operating within a specific organelle.
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an enzyme having an optimum pH and temperature for activity.
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tRNA specifying which amino acids are in a polypeptide.
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the active site of an enzyme that binds to a specific substrate.
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Detailed explanation-1: -Receptors are generally transmembrane proteins, which bind to signaling molecules outside the cell and subsequently transmit the signal through a sequence of molecular switches to internal signaling pathways.
Detailed explanation-2: -Cellular receptors are proteins either inside a cell or on its surface which receive a signal. In normal physiology, this is a chemical signal where a protein-ligand binds a protein receptor. The ligand is a chemical messenger released by one cell to signal either itself or a different cell.
Detailed explanation-3: -Cell-surface receptors are membrane-anchored proteins that bind to ligands on the outside surface of the cell.
Detailed explanation-4: -G-protein-linked receptors bind a ligand and activate a membrane protein called a G-protein, which then interacts with either an ion channel or an enzyme in the membrane. Enzyme-linked receptors are cell-surface receptors with intracellular domains that are associated with an enzyme.