Nucleus
Easybiology
The nucleolus is primarily the site of synthesis for which RNA component?
Select the correct option:
Solution
Incorrect! Answer:
rRNA (large subunit parts)
- Nucleolus: A dense, non-membrane bound structure within the nucleus.
- Function: It is the 'ribosome factory' of the cell.
- rRNA Synthesis: Here, ribosomal DNA (rDNA) is transcribed into ribosomal RNA (rRNA).
- Subunit Assembly: The nucleolus is also the site where newly synthesized rRNA is combined with proteins imported from the cytoplasm to assemble the large and small ribosomal subunits.
- Note: mRNA and tRNA are synthesized by RNA polymerase II and III respectively in other regions of the nucleoplasm.
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About This Question
- Subject
- biology
- Chapter
- cell structure and function
- Topic
- nucleus
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
rRNA (large subunit parts)
- Nucleolus: A dense, non-membrane bound structure within the nucleus.
- Function: It is the 'ribosome factory' of the cell.
- rRNA Synthesis: Here, ribosomal DNA (rDNA) is transcribed into ribosomal RNA (rRNA).
- Subunit Assembly: The nucleolus is also the site where newly synthesized rRNA is combined with proteins imported from the cytoplasm to assemble the large and small ribosomal subunits.
- Note: mRNA and tRNA are synthesized by RNA polymerase II and III respectively in other regions of the nucleoplasm.
This easy difficulty biology question is from the chapter cell structure and function, covering the topic of nucleus. It appeared in the 2025 exam.
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