nucleolar organiser
Definition
Noun 1. A specific chromosomal region: The nucleolar organiser is a distinct part of a chromosome that is responsible for the formation of the nucleolus following the division of a cell's nucleus. It contains the genes for ribosomal RNA.
Usage Examples
- Noun:
- The nucleolar organiser is essential for ribosome production.
- Scientists studied the specific DNA sequences within the nucleolar organiser region.
- Mutations in the nucleolar organiser can affect cell growth and protein synthesis.
Advanced Usage
- "Nucleolar organiser region (NOR)": This is the full technical term for the specific chromosomal segment. It is often abbreviated as NOR in scientific literature.
- The silver-staining technique is used to visualize the nucleolar organiser regions on metaphase chromosomes.
Variants and Related Words
- Nucleolar organizer: An alternative spelling, primarily used in American English.
- NOR: A common abbreviation for "nucleolar organiser region."
- Ribosomal DNA (rDNA): The type of DNA sequence found within the nucleolar organiser, which codes for ribosomal RNA.
Synonyms
- NOR (as an abbreviation).
- Nucleolus organizer region.
Notes on Meaning
This is a specialized term used in cell biology and genetics. It refers to a functional region of a chromosome, not a physical object one can hold. Its primary role is in the synthesis of ribosomal components, making it fundamental to cellular function.
Noun
-
the particular part of a chromosome that is associated with a nucleolus after nuclear division
Khám phá thêm
Các từ liên quan
Từ đồng nghĩa
Từ gần giống
