Podcast
Questions and Answers
Which type of RNA represents the precursors of mRNAs?
Which type of RNA represents the precursors of mRNAs?
- Heterogeneous nuclear RNAs (hnRNAs) (correct)
- Ribosomal RNAs (rRNAs)
- Transfer RNAs (tRNAs)
- Small nuclear RNAs (snRNAs)
Where are heterogeneous nuclear RNAs (hnRNAs) found?
Where are heterogeneous nuclear RNAs (hnRNAs) found?
- Only in the cytoplasm
- Both in the nucleus and cytoplasm
- In the ribosomes
- Only in the nucleus (correct)
What is a characteristic of heterogeneous nuclear RNAs (hnRNAs)?
What is a characteristic of heterogeneous nuclear RNAs (hnRNAs)?
- They have small molecular weights
- They have large molecular weights (correct)
- They are only present in prokaryotic cells
- They are stable and not degraded
What happens to hnRNAs after a very short time?
What happens to hnRNAs after a very short time?
What kind of segment do most eukaryotic mRNAs have?
What kind of segment do most eukaryotic mRNAs have?
What is attached to ribosomes when translated?
What is attached to ribosomes when translated?
Which complex is responsible for the assembly of the preinitiation complex at the TATA box?
Which complex is responsible for the assembly of the preinitiation complex at the TATA box?
What causes a conformation change in DNA when it binds to the promoter?
What causes a conformation change in DNA when it binds to the promoter?
Which protein kinase catalyzes the phosphorylation of RNA polymerase at the carboxylterminal domain (CTD)?
Which protein kinase catalyzes the phosphorylation of RNA polymerase at the carboxylterminal domain (CTD)?
What are the parts of the split gene that contribute to the mature mRNA called?
What are the parts of the split gene that contribute to the mature mRNA called?
What is added during the processing of RNA transcripts as they are synthesized?
What is added during the processing of RNA transcripts as they are synthesized?
What is removed during processing, and exons are connected by what process?
What is removed during processing, and exons are connected by what process?
What sequences are most commonly found at the boundary during RNA splicing?
What sequences are most commonly found at the boundary during RNA splicing?
What is thought to have evolved from self-splicing RNAs?
What is thought to have evolved from self-splicing RNAs?
What becomes associated with a hnRNP as each hnRNA is transcribed?
What becomes associated with a hnRNP as each hnRNA is transcribed?
What does removal of an intron require?
What does removal of an intron require?
What may be the catalytically active components of snRNPs?
What may be the catalytically active components of snRNPs?
What may catalyze the two chemical reactions required for RNA splicing?
What may catalyze the two chemical reactions required for RNA splicing?
What is the function of heterogeneous nuclear RNAs (hnRNAs) in the cell?
What is the function of heterogeneous nuclear RNAs (hnRNAs) in the cell?
What is a characteristic of messenger RNAs (mRNAs) in eukaryotic cells?
What is a characteristic of messenger RNAs (mRNAs) in eukaryotic cells?
What modification do most eukaryotic mRNAs undergo at their 5' and 3' ends?
What modification do most eukaryotic mRNAs undergo at their 5' and 3' ends?
What term describes the difference in size between heterogeneous nuclear RNAs (hnRNAs) and mature mRNAs?
What term describes the difference in size between heterogeneous nuclear RNAs (hnRNAs) and mature mRNAs?
What assists RNA polymerase II in forming the preinitiation complex (PIC) during mRNA transcription?
What assists RNA polymerase II in forming the preinitiation complex (PIC) during mRNA transcription?
What is a key feature of the promoter region critical for mRNA transcription?
What is a key feature of the promoter region critical for mRNA transcription?
What does RNA polymerase II require for the assembly of the preinitiation complex at the promoter region?
What does RNA polymerase II require for the assembly of the preinitiation complex at the promoter region?
Which type of genes contain intervening sequences that are absent from mature mRNAs?
Which type of genes contain intervening sequences that are absent from mature mRNAs?
What is typically found at the boundary during RNA splicing?
What is typically found at the boundary during RNA splicing?
What is added to eukaryotic mRNAs at their 5' end?
What is added to eukaryotic mRNAs at their 5' end?
What are hnRNAs degraded after a very short time?
What are hnRNAs degraded after a very short time?
What is the function of TFIIH in the process of transcription?
What is the function of TFIIH in the process of transcription?
What is the role of TBP in the assembly of the preinitiation complex (PIC)?
What is the role of TBP in the assembly of the preinitiation complex (PIC)?
Which component is responsible for catalyzing the addition of 5’ methylguanosine cap and a 3’ poly(A) tail to pre-mRNA?
Which component is responsible for catalyzing the addition of 5’ methylguanosine cap and a 3’ poly(A) tail to pre-mRNA?
What is the role of snRNAs in the splicing machinery?
What is the role of snRNAs in the splicing machinery?
What is a characteristic of group II introns in relation to self-splicing?
What is a characteristic of group II introns in relation to self-splicing?
What is required for removal of an intron during RNA splicing?
What is required for removal of an intron during RNA splicing?
What is added during processing as pre-mRNA transcripts become associated with ribonucleoproteins?
What is added during processing as pre-mRNA transcripts become associated with ribonucleoproteins?
What is thought to have evolved from self-splicing RNAs?
What is thought to have evolved from self-splicing RNAs?
What is removed during processing, and exons are connected by what process?
What is removed during processing, and exons are connected by what process?
What modification do most eukaryotic mRNAs undergo at their 5' and 3' ends?
What modification do most eukaryotic mRNAs undergo at their 5' and 3' ends?
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