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Which of the following serves as a specific binding site for the proteins involved in membrane fusion during exocytosis?(a) Phosphatidylinositol(b) Phosphatidylinositol 4, 5-biphosphate(c) Phosphatidylinositol 3, 5-biphosphate(d) Phosphatidylinositol 3, 4-biphosphate |
Answer» The correct option is (b) Phosphatidylinositol 4, 5-biphosphate Best explanation: Phosphatidylinositol 4, 5-biphosphate in the cytoplasmic face of plasma membranes serves as a specific binding site for certain cytoskeletal proteins and for some soluble proteins involved in membranes fusion during exocytosis. |
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