PATHOLOGY MCQ
IMMUNE RESPONSE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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A type of protein that detects signals from outside a cell
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A type of carbohydrate that sends signals to other cells
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A type of lipid that provides energy to cells
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A type of gene that is only turned on in red blood cells
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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: -Regardless of the nature of the signal, the target cell responds by means of a specific protein called a receptor, which specifically binds the signal molecule and then initiates a response in the target cell.
Detailed explanation-3: -Reception: A cell detects a signaling molecule from the outside of the cell. A signal is detected when the chemical signal (also known as a ligand) binds to a receptor protein on the surface of the cell or inside the cell.
Detailed explanation-4: -Nuclear receptors. Enzyme-linked receptors. G-protein coupled receptors. Ligand-gated ion channels.