Site of Active Ribosomal RNA Synthesis
Ribosomal RNA (rRNA) synthesis is a critical process for building ribosomes, the protein-synthesizing machinery of the cell. This process occurs in a specific region within the eukaryotic cell nucleus.
The Nucleolus Function
The Nucleolus is a dense structure found inside the nucleus. Its primary function is the synthesis and processing of rRNA, and its assembly with proteins imported from the cytoplasm to form ribosomes. Therefore, the nucleolus is the principal site for active ribosomal RNA synthesis.
Analysis of Other Options
- Kinetochore: Involved in chromosome segregation during cell division, connecting chromosomes to spindle fibers.
- Centrosome: Organizes microtubules and is crucial for cell division (mitosis and meiosis) in animal cells.
- Chromatin: The complex of DNA and proteins (histones) that forms chromosomes within the nucleus. While it contains rRNA genes, the synthesis itself happens within the nucleolus.
Based on cellular function, the Nucleolus is the correct site for active ribosomal RNA synthesis.
Similar Questions
Smooth endoplasmic reticulum ______________ .
The correct sequence of adult cell cycle phases is _______________ .
Cell theory was formulated by __________________ .
- Given below are two statements :
Statement I : Chromosomes are fully condensed at the end of prophase I.
Statement II : Meiosis I resembles mitosis.
In the light of the above statements, choose the most appropriate answer from the options given below : Endomembrane system includes _______________ .
The plastid that stores xanthophyll is known as ________.
- Mitochondrial inner membrane encloses ______
- Match List-I with List-II.
List-I List-II A. Starch I. Fights infection B. Antibody II. Energy storage C. Concanavalin A III. Glucose transport D. Glut-4 IV. Lectin
Choose the correct answer from the options given below : - Match List-I with List-II.
List-I List-II A. Cristae I. Flat membrane sacs in stroma of chloroplast B. Cisternae II. Infoldings in mitochondria C. Thylakoids III. Cell membrane D. Phospholipid IV. Disc shaped sacs in the Golgi apparatus
Choose the correct answer from the options given below : - Arrange the following elements in descending order of their contribution to percentage weight of the human body.
(a) Oxygen
(b) Carbon
(c) Hydrogen
(d) Nitrogen
Choose the correct answer from the options given below :
Important Questions from Cell Structure and Function
Smooth endoplasmic reticulum ______________ .
The correct sequence of adult cell cycle phases is _______________ .
Cell theory was formulated by __________________ .
- Given below are two statements :
Statement I : Chromosomes are fully condensed at the end of prophase I.
Statement II : Meiosis I resembles mitosis.
In the light of the above statements, choose the most appropriate answer from the options given below : Endomembrane system includes _______________ .
