Which cell structure is responsible for the formation of ribosomes?
Table of Contents
- 1 Which cell structure is responsible for the formation of ribosomes?
- 2 What assembles RNA and protein that will form ribosomes?
- 3 What structure in an interphase eukaryotic cell is the site of ribosomal RNA transcription?
- 4 Where do ribosomal proteins come from?
- 5 Do ribosomes contain RNA and proteins?
- 6 What is the structure of ribosomal RNA?
- 7 What are ribosomal subunits made of?
Which cell structure is responsible for the formation of ribosomes?
the nucleolus
The nucleus contains the cell ‘s DNA and directs the synthesis of ribosomes and proteins. Found within the nucleoplasm, the nucleolus is a condensed region of chromatin where ribosome synthesis occurs.
What assembles RNA and protein that will form ribosomes?
The most prominent substructure within the nucleus is the nucleolus (see Figure 8.1), which is the site of rRNA transcription and processing, and of ribosome assembly.
Where are ribosomal proteins and RNA produced?
nucleolus
The three major types of RNA that occur in cells are rRNA, mRNA, and transfer RNA (tRNA). Molecules of rRNA are synthesized in a specialized region of the cell nucleus called the nucleolus, which appears as a dense area within the nucleus and contains the genes that encode rRNA.
What structure in an interphase eukaryotic cell is the site of ribosomal RNA transcription?
The nucleolus is the largest nuclear organelle and is the primary site of ribosome subunit biogenesis in eukaryotic cells. It is assembled around arrays of ribosomal DNA genes, forming specific chromosomal features known as nucleolar organizing regions (NORs) which are the sites of ribosomal DNA transcription.
Where do ribosomal proteins come from?
Ribosomal proteins, like other proteins, are synthesized in the cytoplasm. Although many of them are small and thus below the theoretical exclusion limit of the NPC, they are nonetheless actively imported by kap-mediated processes.
What area in the nucleus is responsible for assembling ribosomal RNA in eukaryotic cells?
The nucleolus is a region found within the cell nucleus that is concerned with producing and assembling the cell’s ribosomes. Following assembly, ribosomes are transported to the cell cytoplasm where they serve as the sites for protein synthesis.
Do ribosomes contain RNA and proteins?
The ribosome is a complex molecule made of ribosomal RNA molecules and proteins that form a factory for protein synthesis in cells. In 1955, George E. Palade discovered ribosomes and described them as small particles in the cytoplasm that preferentially associated with the endoplasmic reticulum membrane.
What is the structure of ribosomal RNA?
Ribosomal RNA is the predominant form of RNA found in most cells; it makes up about 80\% of cellular RNA despite never being translated into proteins itself. Ribosomes are composed of approximately 60\% rRNA and 40\% ribosomal proteins by mass….Ribosomal RNA.
| rRNAs | |
|---|---|
| RNA type | Gene; rRNA |
| PDB structures | PDBe |
What part of the cell manufactures ribosomal subunits?
The Nucleolus
The Nucleolus – The nucleolus is a membrane-less organelle within the nucleus that manufactures ribosomes, the cell’s protein-producing structures.
What are ribosomal subunits made of?
ribosomal RNA
Ribosomal subunits are composed of ribosomal RNA (rRNA) and proteins. Ribosomal subunits with different S-values are composed of different molecules of rRNA, as well as different proteins. Remember that RNA is a polymer of ribonucleotides containing the nitrogenous base adenine, uracil, guanine, or cytosine.