The structure in the portion of a cell membrane attached below that recognizes chemical signals is ; ( D ) i.e. structure labelled B in the diagram
The structure in a cell that is responsible for recognizing chemical signals are known as receptors which are Large proteins and they can be located either inside a cell or outside a cell. while cell to cell signalling involves plasma membrane junctions interacting with surface proteins present in within cells .
Hence we can conclude that the structure that functions as chemical signal receptor is the structure labelled B in the diagram.
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