The Site for Active ribosomal RNA Synthesis is

Question

Question

This question was previously asked in

AMRU HP BSc Nursing Admission Test 7 July 2024 Official Paper

Answer 1

Correct Answer: Nucleolus

Rationale:

The nucleolus is a prominent sub-nuclear structure that is not bound by a membrane and resides within the nucleus of eukaryotic cells.
It is the primary site of ribosomal RNA (rRNA) synthesis and ribosome biogenesis. The nucleolus assembles ribosomal subunits by transcribing and processing rRNA and combining it with ribosomal proteins.
The rRNA is a crucial component of ribosomes, which are essential for protein synthesis within the cell. Ribosomes read mRNA sequences and translate them into polypeptide chains, forming proteins.

Explanation of Other Options:

Ribosome

Rationale: Ribosomes are the sites of protein synthesis where translation of messenger RNA (mRNA) into proteins occurs. They are not involved in the synthesis of ribosomal RNA.

Mitochondria

Rationale: Mitochondria are the powerhouses of the cell, responsible for producing ATP through oxidative phosphorylation. They are not involved in the synthesis of ribosomal RNA.

Vacuoles

Rationale: Vacuoles are storage organelles found in cells, especially large in plant cells. They store nutrients, waste products, and help in maintaining turgor pressure. They do not play a role in the synthesis of ribosomal RNA.

Conclusion:

Among the given options, the nucleolus is the correct site of active ribosomal RNA synthesis. The other options are involved in different cellular processes and do not contribute to the synthesis of rRNA.