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BIOL 211 General Genetics RNA Structure and Function Quiz

10 Questions

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BIOL 211 General Genetics RNA Structure and Function Quiz

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Questions and Answers

What replaces deoxyribose in RNA?

Helicase

Ribose (correct)

Thymine

Uracil

Which nitrogenous base replaces thymine in RNA?

Deoxyribose

Uracil (correct)

Ribose

Helicase

Which class of cellular RNAs functions during gene expression?

rRNAs

tRNAs

mRNAs (correct)

DNA polymerases

What is the enzyme that directs RNA synthesis during transcription?

RNA Polymerase Signup and view all the answers

What is the function of the sigma factor in RNA transcription?

Recognition of the promoter region Signup and view all the answers

What are the two consensus sequences found in E. coli promoters?

TTGACA and TATAAT Signup and view all the answers

Which RNA polymerase is responsible for the transcription of a wide range of genes in eukaryotes?

RNA Pol II Signup and view all the answers

What type of sequences influence the efficiency of transcription initiation by RNAP II?

Proximal-promoter elements Signup and view all the answers

What is the role of enhancers and silencers in eukaryotic transcription?

Enhancers increase transcription levels; silencers decrease them Signup and view all the answers

Which post-transcriptional modification involves the removal of introns and joining of exons?

Splicing Signup and view all the answers