Question

What are exons and introns?

Answer 1

Hint: Introns and exons are sequences of nucleotides within a gene. As RNA matures, introns are eliminated by RNA splicing, indicating that they are not represented in the final product of messenger RNA ( mRNA), although exons continue to be covalently bound to each other in order to build mature mRNA.

Complete Answer:
- An exon is any part of a gene which, after introns have been removed by RNA splicing will encode a part of the final mature RNA formed by that gene. In RNA transcripts, the term exon refers to both the DNA sequence inside a gene and the corresponding sequence.
- Introns are separated in RNA splicing and exons are covalently joined to each other as part of the mature messenger RNA generation. Much like the genome constitutes the entire set of genes for a person, the exome constitutes the entire set of exons.
- An intron (for the intragenic region) is any nucleotide sequence within a gene that during maturation of the final RNA product is extracted by RNA splicing. In other words, introns are non-coding regions of an RNA transcript that are removed by splicing before translation or the DNA that encodes it.
- The word intron, i.e. an area within a gene, is derived from the term intragenic area. The word intron refers in RNA transcripts to both the DNA sequence inside a gene and the corresponding sequence. Sequences that, after RNA splicing, are linked together in the final mature RNA are exons.
- Introns are present in most organisms' genes and certain viruses and can be found in a wide variety of genes, including protein-generating, ribosomal RNA ( rRNA) and RNA (tRNA) transfer genes. RNA splicing takes place as part of the RNA processing pathway that follows transcription and precedes translation when proteins are produced from intron-containing genes.

Note: Introns are non-coding DNA sequences within a gene that, during maturation of the RNA element, are extracted by RNA splicing. Exons are protein-coding DNA sequences that require the requisite codons or data needed for the synthesis of proteins.