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Item 4 of 40 Question Id: 1417 More Molecular biologists are investigating the functional significance of non-coding RNA molecules. During an experiment, they isolate large complexes containing both protein and RNA from exocrine pancreatic cells. The complexes are found both freely floating in the cytoplasm and bound to the endoplasmic reticulum. The RNA found within these complexes is primarily synthesized at which of the following intracellular sites? A. A (10%) B. B (51%) C. C (23%)