Which of these is a receptor molecule? A. cell membrane with an integral molecule marked B. There is a specific recess in this m
olecule on the extracellular side. C. A molecule in the intracellular fluid, whose shape is identical to this recess, is marked A. D. Letter C marks a molecule connected to molecule B and is located in the cytoplasm. E. Letter D marks a molecule in the cytoplasm, near molecule C. F. Letter E marks a molecule in the cytoplasm located below molecule D.
Receptor may be defined as the molecule to which the ligands or the signalling molecule binds. The binding of the molecules with its receptor helps in initiating the signalling cascade of the body.
The molecule that are marked B can acts as receptor because the receptor may present on the cell membrane or in the cytosol or in the nucleus. The B molecule shows the recess marked with the other molecule.
Plant cells have vacuoles and these can either store useful products or waste products. The cell can get ride of the waste by bringing it to the cell membrane and then the cell membrane closes around the garbage. All of this is possible because of the vacuoles.
