Answer :
Final answer:
All mechanisms listed are forms of gene regulation after transcription in eukaryotes except for polymerase stalling, which is a regulatory mechanism during transcription.
Explanation:
The question is asking about the mechanisms of gene regulation that take place after transcription is completed in eukaryotes. These physiological processes include RNA cleavage by siRNA, mRNA degradation, RNA splicing, and RNA interference. These are all mechanisms that direct gene expression post-transcription, wherein the initial RNA transcript undergoes various changes before being translated into a protein.
However, polymerase stalling is not a mechanism of gene regulation that occurs after transcription. It's a method of gene regulation that can occur during transcription. Polymerase stalling, also known as promoter-proximal pausing, happens when RNA polymerase II transcribes a short distance then halts, awaiting additional signals for resumption. It serves as a critical checkpoint in gene expression at the transcriptional level, not post-transcriptional.
Learn more about Gene Regulation here:
https://brainly.com/question/7196655
#SPJ11
