The correct answer is B. Polyribosomes.
In the endoplasmic reticulum (ER), multiple ribosomes can be attached to the membrane simultaneously, forming complexes known as polyribosomes or polysomes. Polyribosomes are involved in intense protein synthesis. They enable multiple ribosomes to work together on the same mRNA molecule, allowing for the efficient production of proteins. Each ribosome in the polyribosome translates the mRNA into protein, resulting in a high rate of protein synthesis. Therefore, the presence of polyribosomes is associated with intense protein synthesis within the cell. Options A and D (abnormal function and cell becomes malignant) are not directly related to the formation of polyribosomes in the ER.
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