Each answer box represents a mechanism by which eukaryotes can regulate gene exp
ID: 253380 • Letter: E
Question
Each answer box represents a mechanism by which eukaryotes can regulate gene expression. Determine which of the five mechanisms each example represents. Not all examples will be u 5 Changes in chromatin structure Activity of transcription apparatus Initiation of translatiorn RNA processing RNA interference Methylation of islands Initiation of Alternative splicing transcription produces different represses promoter transcripts from the same gene. A siRNA and the transcript it targets are transcribed from the same gene. Limited availability of initiation factors prevents translation of mRNA. occurs upon binding translocation may cause a gene to be regulated in a way intended for a different gene. the TATA box. Previous Give Up & View Solution # Try Again Next Exit Explanation Whereas other examples may also be misplaced, you have incorrectly matched an example of chromosomal rearrangement with a mechanism of gene expression. Although chromosomal rearrangements can affect how a gene is regulated, rearrangements are the unintended products of abnormal chromosome dynamics. Therefore, a description of chromosomal rearrangement does not match any of the five mechanisms.Explanation / Answer
Changes in Chromatin structure will include only "Chromosomal translocation may cause a gene to be regulated in a way intended for a different gene".
"Methylation of CpG islands represses promoter activity", this statement is an example of epigenetic control of gene expression which does not require or involve any kind of changes in the chromatin structure.
The other options are matched correctly with activity of transcription appratus being initiation of transcription upon binding of TFIID to TATA box, RNA processing involves splicing along with capping and tailing, RNA interference thta includes siRNA and limited availability of initiation factors that further regulate the level of gene expression.
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