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Biology Cell Biology Difficulty: Medium

Consider the following statements regarding the ultrastructure of the nucleolus and choose the correct answer: 1. The matrix or pars amorpha of the nucleolus is heterogeneous 2. The chromatin is Feulgen positive 3. The fibrils, 80 - 100 A in diameter, contain RNA and are probably the precursors of the granules 4. Ribonucleoprotein granules make up the pars granulosa

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