Exam 11: Transcription of the Genetic Code: Biosynthesis of Rna

A) Nucleoside triphosphates are the precursors for replication, but nucleoside diphosphates are used for transcription.
B) Both strands of DNA are copied in replication, but usually only one is copied in transcription.
C) Base pairing is used to copy the sequence in replication, but not in transcription.
D) The chain grows from the 5' to the 3' end in replication, but 3' to 5' in transcription.

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A) It tells the RNA Polymerase where to sit down.
B) It helps point the RNA Pol in the proper direction.
C) It causes the RNA Pol to bind tightly to the DNA.
D) It stays with the RNA Pol throughout synthesis.

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A) is a multisubunit enzyme
B) consists of a single polypeptide chain
C) requires Mn²⁺ for activity
D) requires a DNA primer

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A) A promoter consensus sequence located at approximately -35.
B) A promoter consensus sequence located at approximately -10.
C) A sequence forming a hairpin loop signaling the termination of transcription.
D) A sequence immediately surrounding the start site of transcription.

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A) They have a molecule sensing domain called an aptamer
B) There are known pathogens that use riboswitches as part of their mechanism
C) They respond to specific molecules and control translation in a way that is often similar to transcription attenuation
D) They contain a sensing domain and a decision making domain
E) All of these

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A) The mechanism of activation of eukaryotic genes involves addition and removal of phosphate residues from some of the transcription factors.
B) In plants, there are 5 RNA polymerases.
C) RNA Pol IV is the primary RNA synthesizer in plants
D) Of the RNA Polymerases in eukaryotes, Pol II is the most extensively studied.

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A) helix-turn-helix
B) leucine zipper
C) zinc finger
D) b-barrel

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A) mRNA
B) rRNA
C) tRNA
D) All of these

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A) Enhancers do not bind RNA polymerase.
B) Enhancers include the UP element.
C) Enhancers bind the sigma (s) factor.
D) There is no difference; these terms are synonymous.

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A) the transcription start site
B) the Pribnow box (-10 region)
C) the -35 region
D) the UP element

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