Question: Ribosomes are synthesized and assembled in which of the following?
Options:
Nucleolus
Nucleus
Cytoplasm
Cytosol
✅Explanation:
-Nucleolus: This specialized region contains rRNA (ribosomal RNA), ribosomal proteins, and assembly factors needed for ribosome construction. It undergoes active transcription and processing of rRNA, and subsequently assembles the ribosomal subunits before they are exported to the cytoplasm for protein synthesis.
-Nucleus: While the nucleus houses the DNA and plays a key role in protein synthesis by providing genetic information, it's not directly involved in ribosome assembly.
-Cytoplasm: This region outside the nucleus contains various organelles, including ribosomes, but it doesn't have the machinery needed for ribosome synthesis.
-Cytosol: This fluid-filled part of the cytoplasm also serves as a platform for numerous cellular processes, but it lacks the specific components for ribosome assembly.
🔴Related Terminologies::
-rRNA (ribosomal RNA):Â This type of RNA forms the structural core of ribosomes and is transcribed within the nucleolus.
-Ribosomal proteins:Â These proteins contribute to the structure and function of ribosomes and are also synthesized in the cytoplasm.
-Nucleolar organizing region (NOR):Â This specific DNA region within the nucleolus encodes rRNA genes.
-Ribosome biogenesis:Â This complex process refers to the synthesis and assembly of ribosomes.