noncoding dna
A scientist points to a highlighted section of noncoding DNA on a large educational diagram.
NounSequences of DNA within a eukaryotic gene that are not translated into a protein. This includes introns (intervening sequences that are removed during RNA processing) and other regulatory or structural regions that do not directly code for amino acid sequences.
The term "noncoding DNA" is used in genetics and molecular biology to describe parts of the genome that do not provide instructions for making proteins. It is often contrasted with "coding DNA" or "exons."
Examples: * A significant portion of the human genome consists of noncoding DNA. * Scientists are studying the function of noncoding DNA sequences, which may play roles in gene regulation. * Introns are a classic example of noncoding DNA within a gene.
- While historically called "junk DNA," much noncoding DNA is now known to be functional, containing elements that control when and where genes are turned on.
- The term is often used in discussions about genome evolution, complexity, and the genetic basis of diseases.
- Non-coding DNA: An alternative spelling with a hyphen.
- Noncoding region: A more general term for any segment of DNA that does not code for protein.
- Intron (n): A specific type of noncoding DNA sequence within a gene that is transcribed into precursor mRNA but is removed by splicing.
- Regulatory sequence (n): A type of functional noncoding DNA that controls gene expression.
- Intervening sequence (specifically for introns)
- Non-coding sequence
- Coding DNA
- Exon: A segment of a DNA or RNA molecule containing information coding for a protein or peptide sequence.
A scientist points to a highlighted section of noncoding DNA on a large educational diagram.
- sequence of a eukaryotic gene's DNA that is not translated into a protein