Multiple Choice
When the siRNA interacts with RISC for the first time it is single stranded.
7. Gene Expression
Post-Transcriptional Regulators
Struggling with Cell Biology?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Choose all of the following post-transcriptional regulators of gene expression.
A
Micro RNAs
B
siRNAs
C
RNA Polymerase Degradation
D
Exosomes
Verified step by step guidance1
Understand that post-transcriptional regulation refers to the control of gene expression after the transcription process, which involves the synthesis of RNA from DNA.
Recognize that micro RNAs (miRNAs) are small non-coding RNA molecules that play a role in post-transcriptional regulation by binding to complementary sequences on target mRNAs, usually resulting in gene silencing.
Identify that small interfering RNAs (siRNAs) are similar to miRNAs in function, as they also bind to mRNA and lead to its degradation or translational repression, thus regulating gene expression post-transcriptionally.
Consider the role of RNA polymerase, which is primarily involved in the transcription process, not post-transcriptional regulation. Therefore, RNA polymerase degradation is not a typical mechanism of post-transcriptional regulation.
Examine the function of exosomes, which are small vesicles that can transport RNA molecules between cells. While they can influence gene expression, their primary role is not direct post-transcriptional regulation within the cell.
Related Videos
Related Practice
Post-Transcriptional Regulators practice set
Problem sets built by lead tutorsExpert video explanations