Which one of the following is the site for active ribosomal RNA synthesis?
Answer: (C) Nucleolus. Answer: (C) Nucleolus Solution: The nucleolus is a non-membrane-bound spherical structure in the nucleoplasm that is the site for active ribosomal RNA synthesis, with larger and more numerous nucleoli in cells actively making protein.
- A.Centrosome
- B.Chromatin
- C.Nucleolus✓
- D.Kinetochore
Correct Answer
(C) Nucleolus
Solution & Explanation
Answer: (C) Nucleolus Solution: The nucleolus is a non-membrane-bound spherical structure in the nucleoplasm that is the site for active ribosomal RNA synthesis, with larger and more numerous nucleoli in cells actively making protein. The centrosome and kinetochore are associated with cell division, and chromatin is the nucleoprotein fibre material - none of these is the site of rRNA synthesis. NCERT Reference: Ch 8, p.100, lines 42-43: "active ribosomal RNA synthesis. Larger and more numerous nucleoli are"