25. selective pre-mRNA degradation happens in the cytoplasm after the mRNAs have been translated true or false

Describe three (3) ways in which the primary transcript is modified as it is converted to mRNA.

Can you help me with this question?

Which basal transcription factor contains a subunit that causes local distortion in DNA so that proteins can assemble to the promoter? TFIIA TFIID TELIH TFUIF

36.Start with two exons and an intervening intron. Include the cap and poly-A tail in your starting pre-mRNA. Show 2’-OH, 3’-OH, O-P-O phosphodiester bonds for the two transesterification reactions that splice exon 1 and exon 2. Be sure to include the branchpoint A and intron consensus sequences. You will need to show where the incoming -OH attacks the O-P-O bond to allow correct splicing in the lariat and between exons. Make your arrows precise. Show the lariat with the consensus sequences. Whenever possible, show 5’ and 3’ ends. Explain the fate of the lariat after it forms?

Enhancers and silencers increase or decrease transcription levels from the distance bind to the RNA polymerase are essential for chain elongation are essential for termination

You need to determine if a specific mRNA is modified. What method will you choose to determine this and why?

39

3. Differentiate between factors and processes involved in transcription: Recognition of this DNA sequence is [Choose] required for transcription to initiate:. [ Choose ] PROMOTER Occurs when the ribosome reaches a RNA POLYMERASE stop codon on the MRNA TERMINATION INITIATION SITE ENHANCERS The main enzyme responsible for transcribing DNA into RNA is ELONGATION Will increase the efficiency of gene [Choose] expression, but are not essential for transcription. RNA polymerase "walks" along the template strand, adding a [Choose ] matching (complementary) RNA nucleotide to each existing ncleotide. The section of DNA from which the [Choose ) very first 5" RNA nucleotide is transcribed Question 4 1 pts hp 近

1. What happens during transcription? Possible sentence frame: Transcription is the process in which the information from converted into This happens by is