Each answer box represents a mechanism by which eukaryotes normally regulate gene expression Determine which of the five mechanisms each example represents. Not all examples will be used
1) RNA processing
2) RNA interference
3) Changes in chromatin structure
3) Activity of transcription apparatus
4) Initiation of translation
Answer Bank
a. Gene inversion does not cause a loss of genetic information but may affect regulation of the inverted genes.
b. Transcriptional activators increase promoter activity by interacting with the RNAPI holoenzyme
c. Acetylation of histones facilitates transcription
d. Alternative splicing produces different transcripts from the same gene.
e. The RISC degrades mRNA complexed with miRNA or siRNA
f. Limited availability of initiation factors prevents translation of mRNA.