Transcription Trek

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Test your RNA transcription basics

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Isabelle Shiraishi

Estados Unidos

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Transcription Trek


Froggy Jumps Transcription TrekVersión en línea Test your RNA transcription basics por Isabelle Shiraishi 1 What enzyme catalyzes RNA synthesis from a DNA template? a RNA polymerase b Reverse transcriptase c DNA polymerase 2 In prokaryotes, how many RNA polymerases synthesize rRNA, tRNA, and mRNA? a Three b Two c One 3 Which direction is the RNA strand extended during transcription? a 3' to 5' b Both directions c 5' to 3' 4 What is the transcribed DNA strand called? a Both strands b Template (nonsense) strand c Coding (sense) strand 5 What are the conserved promoter regions in bacteria? a -25 and -5 sequences b -35 and -10 sequences c TATA box and CAAT box 6 What terminates transcription in a protein-independent way? a UV-induced termination b GC-rich followed by U-rich sequence c Rho-dependent termination 7 What factor helps RNA polymerase recognize bacterial promoters? a Helicase b DNA ligase c Sigma factor 8 Which RNA polymerase transcribes mRNA in eukaryotes? a RNA polymerase III b RNA polymerase II c RNA polymerase I 9 What processing event adds a 5' cap to eukaryotic pre-mRNA? a Capping with a guanylate cap b Polyadenylation c Splicing 10 What complex carries out splicing of pre-mRNA introns? a spliceosome b Ribosome c POL II holoenzyme 11 What is added to the 3' end of most eukaryotic mRNAs? a 5' cap b Poly-A tail c GU-rich terminator sequence 12 Which molecule assists in transcription initiation in eukaryotes via protein interactions? a CAP protein b Ribosome c Mediator 13 What role do introns play in evolution besides coding? a Exon shuffling and diversification b Promoter melting c Direct translation 14 Which modification marks mRNA for export and translation readiness? a 5' cap and poly-A tail with splicing b Ribozyme addition c DNA capping 15 What enzyme catalyzes RNA synthesis from a DNA template? a DNA polymerase b RNA polymerase c DNA helicase 16 In prokaryotes, how many RNA polymerases synthesize rRNA, tRNA, and mRNA? a Three b Two c One 17 Which strand is used as the template during transcription? a Both strands b Template (nonsense) strand c Coding (sense) strand 18 What is the promoter region in bacteria commonly containing near transcription start? a TATA box b CAAT box c –35 and –10 regions 19 Which factor helps RNA polymerase recognize bacterial promoters? a Sigma subunit b Transcription factor II H c Promoter enhancer 20 What term describes the end of transcription in bacteria where termination occurs without proteins? a Protein-independent termination b RNA capping c Protein-dependent termination 21 In eukaryotes, which RNA polymerase transcribes mRNA genes? a Pol II b Pol I c Pol III 22 What is the role of TBP (TATA-binding protein) in Pol II transcription? a Binds the TATA box and helps recruit other factors b Cleaves RNA c Unwinds DNA 23 What processing steps occur to eukaryotic pre-mRNA before export? a Splicing only b Capping, polyadenylation, splicing c Capping only 24 Name a consequence of splicing defects in humans. a Inherited diseases (e.g., β-thalassemia) b Increased RNA stability c Enhanced translation

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Transcription TrekVersión en línea

por Isabelle Shiraishi

What enzyme catalyzes RNA synthesis from a DNA template?

In prokaryotes, how many RNA polymerases synthesize rRNA, tRNA, and mRNA?

Which direction is the RNA strand extended during transcription?

What is the transcribed DNA strand called?

What are the conserved promoter regions in bacteria?

What terminates transcription in a protein-independent way?

What factor helps RNA polymerase recognize bacterial promoters?

Which RNA polymerase transcribes mRNA in eukaryotes?

What processing event adds a 5' cap to eukaryotic pre-mRNA?

What complex carries out splicing of pre-mRNA introns?

What is added to the 3' end of most eukaryotic mRNAs?

Which molecule assists in transcription initiation in eukaryotes via protein interactions?

What role do introns play in evolution besides coding?

Which modification marks mRNA for export and translation readiness?

What enzyme catalyzes RNA synthesis from a DNA template?

In prokaryotes, how many RNA polymerases synthesize rRNA, tRNA, and mRNA?

Which strand is used as the template during transcription?

What is the promoter region in bacteria commonly containing near transcription start?

Which factor helps RNA polymerase recognize bacterial promoters?

What term describes the end of transcription in bacteria where termination occurs without proteins?

In eukaryotes, which RNA polymerase transcribes mRNA genes?

What is the role of TBP (TATA-binding protein) in Pol II transcription?

What processing steps occur to eukaryotic pre-mRNA before export?

Name a consequence of splicing defects in humans.