Regulation Of Transcription And Translation

Question 1

What stops translation

Answer 1

siRNA
miRNA
both break mRNA before it can be transcribed

Question 2

What changes transcription

Answer 2

-hypermethylation of DNA
-hypomethylation of histones
-mutation of DNA (changes base sequence) at promoter region

Question 3

What is siRNA

Answer 3

small interfering RNA
used for short term switching off of gene
The siRNA binds to a complementary sequence of mRNA. As mRNA is usually single stranded and the cell detects the double stranded form on mRNA and views it as abnormal. mRNA is broken down by enzymes prevent8ng transcription