The thick protein coat outside the plasma membrane of Paramecium is the

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The thick protein coat outside the plasma membrane of Paramecium is called the pellicle. This structure provides shape and support to the cell and is composed of interlocking protein strips that form a flexible layer around the cell. The other options (cell wall, cuticle, epidermis, and tegument) are not present in Paramecium, as it is a single-celled organism and does not have multiple cell layers or structures like those found in multicellular organisms.

The Thick Protein Coat Outside the Plasma Membrane of Paramecium