6.1 gene expression in eukaryotes Flashcards
what are the three methods of regulating gene expression in eukaryotes?
the three methods of regulating gene expression in eukaryotes:
- transcription factors
- post-transcriptional gene regulation
- post-translational level of gene regulation
what are transcription factors?
transcription factors are proteins or short non-coding pieces of RNA that act within the cell’s nucleus to control which genes in a cell are turned on or off
what do transcription factors do?
transcription factors act within the cell’s nucleus to control which genes in a cell are turned on or off
how do transcription factors control which genes in a cell are turned on or off?
transcription factors control which genes in a cell are turned on or off by sliding along a part of the DNA molecule, seeking and binding to their specific promoter region
what are the roles of transcription factors?
the roles of transcription factors include:
- aiding or inhibiting the attachment of RNA polymerase to the DNA
- activating or suppressing the transcription of the gene
what are the role of transcription factors essential for?
the role of transcription factors are essential for the regulation of gene expression in eukaryotes
what does the regulation of gene expression ensure?
the regulation of gene expression ensures that different genes in different types of cells are activated or supressed
what are some transcription factors involved in regulating?
some transcription factors are involved in regulating the cell cycle
post-transcriptional gene regulation
starts here
what are introns?
introns are non-coding regions of DNA
are introns expressed?
introns are not expressed
what are exons?
exons are coding and expressed regions
what do introns do?
introns separate the exons
