Genetic variants can have an impact on chromatin structure (7, 8), on gene transcription (7, 9, 10), and on posttranscriptional processes, including mRNA splicing
Question
Genetic variants can have an impact on chromatin structure (7, 8), on gene transcription (7, 9, 10), and on posttranscriptional processes, including mRNA splicing
Solution
Claro, aquí tienes una respuesta paso a paso:
-
Impacto en la estructura de la cromatina: Las variantes genéticas pueden alterar la forma en que la cromatina se organiza y se compacta. Esto puede influir en la accesibilidad del ADN para la maquinaria de transcripción y otros procesos celulares.
-
Impacto en la transcripción génica: Las variantes genéticas pueden afectar la transcripción de genes, es decir, el proceso mediante el cual se copia la información del ADN en ARN mensajero (ARNm). Esto puede ocurrir a través de cambios en los sitios de unión de los factores de transcripción o en la estructura del promotor del gen.
-
Impacto en los procesos postranscripcionales: Después de la transcripción, las variantes genéticas pueden influir en cómo se procesa el ARNm. Un ejemplo clave es el empalme del ARNm, donde se eliminan los intrones y se unen los exones. Las variantes pueden alterar los sitios de empalme, lo que puede resultar en diferentes isoformas de ARNm y, por ende, en diferentes proteínas.
En resumen, las variantes genéticas pueden tener efectos significativos en múltiples niveles de la expresión génica, desde la estructura de la cromatina hasta los procesos postranscripcionales como el empalme del ARNm.
Similar Questions
What is/are the advantage(s) of alternative splicing in eukaryotes?Group of answer choicesless chances of mutation in the genesgenerate variations in proteinsenlarges the repertoire of proteins in eukaryoteb and call of the above
What is the effect of high levels of histone acetylation on the expression of a gene?Group of answer choicesThis changes the splicing of the geneIt causes the chromatin to condenseThe gene becomes expressed lessThe gene becomes expressed more
Which one of the following is true about splicing?Group of answer choicesIn prokaryotes, splicing repressors prevent the recognition of a 3’ splice junction.Splicing activators are proteins with RNA binding activityDifferential splicing means that proteins can be produced with their domains in different orders.In eukaryotes, all cells produce one splicing pattern for a particular gene.
Which is true regarding mRNA transcription and processing?Group of answer choicesThe 5’ AAUAAA 3’ sequence that directs the addition of the polyA tail is added to the mRNA strand by polyadenylation factors.A 7-methylguansoine cap is added to the 3’ end of an mRNA strand.During splicing, a linkage is formed between one end of the intron, and a base in the middle of the intron, forming a looped RNA.The sequences in the mRNA strand that direct the activity of the spliceosome are located in the intron and the exon.
Which is true regarding mRNA transcription and processing?Group of answer choicesA 7-methylguansoine cap is added to the 3’ end of an mRNA strand.The sequences in the mRNA strand that direct the activity of the spliceosome are located in the intron and the exon.The 5’ AAUAAA 3’ sequence that directs the addition of the polyA tail is added to the mRNA strand by polyadenylation factors.During splicing, a linkage is formed between one end of the intron, and a base in the middle of the intron, forming a looped RNA.
Upgrade your grade with Knowee
Get personalized homework help. Review tough concepts in more detail, or go deeper into your topic by exploring other relevant questions.