NEETBotanyCell - The Unit of Life
In a eukaryotic cell, the site for active synthesis of ribosomal RNA (rRNA) is characterized by which of the following structural features?
Options
- AIt is bounded by a single unit membrane.
- BIt is not bounded by any membrane.
- CIt is bounded by a double membrane.
- DIt is located freely in the cytoplasm.
Correct answer
B. It is not bounded by any membrane.
Step-by-step solution
The site for active synthesis of ribosomal RNA (rRNA) in a eukaryotic cell is the nucleolus. According to NCERT, the nucleolus is a non-membranous structure present in the nucleoplasm. Since it is not bounded by any membrane, its content is continuous with the rest of the nucleoplasm. Single or double membrane-bound structures include organelles like vacuoles, lysosomes, mitochondria, and the nucleus itself, but not the nucleolus. Answer: It is not bounded by any membrane.