Post-Transcriptional Modification of mRNA

The video tutorial explains the process of transcription and the various types of RNA, focusing on mRNA. It details the steps involved in mRNA processing, including 5' capping, splicing, and polyadenylation. The tutorial also covers the mechanisms of 5' capping and the roles of introns and exons in RNA. Finally, it describes the polyadenylation process, emphasizing the importance of these modifications for mRNA stability and function.

What is the primary function of mRNA processing?

• To degrade RNA

• To replicate RNA

• To synthesize DNA

• To prepare mRNA for translation

Which of the following is NOT a type of RNA mentioned in the video?

• mRNA

• tRNA

• rRNA

• dRNA

Which of the following is the first step in mRNA processing?

• Intron splicing

• 3' polyadenylation

• 5' capping

• Translation

What is the role of phospho hydrolase in 5' capping?

• To add a methyl group

• To remove a phosphate group

• To splice introns

• To synthesize RNA

What is the function of a spliceosome?

• To add a 5' cap

• To synthesize DNA

• To degrade mRNA

• To splice out introns

Which components of mRNA are retained after splicing?

• Both introns and exons

• Neither introns nor exons

• Exons

• Introns

What sequence does the endonuclease target during mRNA processing?

• GCU

• AAUAAA

• UAA

• AUG

What is the purpose of polyadenylation in mRNA processing?

• To add a 5' cap

• To add a poly-A tail

• To synthesize proteins

• To splice out introns

Which enzyme is responsible for adding the poly-A tail?

• Guanylyl transferase

• Phospho hydrolase

• RNA polymerase

• Polyadenylate polymerase

What is the final product of mRNA processing?

• Mature mRNA

• Protein

• Immature mRNA

• DNA