RNA Processing

RNA processing includes ________.

• base modification

• intron removal and exon splicing

• addition of extra bases

• all of above

Poly(A) polymerase _______.

• adds the poly(A) tail to prokaryotic mRNAs

• generates short RNA molecules with repeating adenine residues used in regulation of transcription

• adds the adenine cap to processed eukaryotic mRNAs

• generates the 3’ tail on eukaryotic mRNAs

Primary transcripts are in the final form for translation into protein.

• True

• False

Multiple messenger RNAs can be generated from the same gene by selecting_____

• an alternative promoter when available

• a different location for the addition of the poly(A) tail

• and splicing different exon cassettes

• all of the above

Ribozymes are _______

• protein complexes involved in RNA processing

• proteins that degrade RNAs

• RNA molecules with catalytic activities

• generated from proteins

Self-splicing introns, ribosomes, and RNase P are examples of _____

• ribozymes

• proteins

• RNA processing enzymes

• structural RNAs

Which modified nucleotide base is part of the 5’ cap on eukaryotic mRNAs?

• cytosine

• guanine

• adenine

• uracil

The regions of transcript that contain protein coding sequence are called ____

• introns

• exons

• inteins

• exteins

 

5' end capping is a post-transcriptional modification of mRNA that

• Adds a methylated guanine to the 3' end of mRNA

• adds adenosine nucleotides to the 3' end of mRNA

• removes the introns and joins the exons together

• Adds a methylated guanine to the 5' end of mRNA

The specialized enzyme(s) that do the mRNA processing are called the...

• RNA Polymerase

• Spliceosome

• Helicase

• RNA Catalase