Which of the following best describes a promoter?Group of answer choicesA regulatory protein that accelerates mRNA turnoverAn element that promotes termination of transcriptionAn extracellular inducer that controls gene expressionA DNA sequence to which RNA polymerase may bind
Question
Which of the following best describes a promoter?Group of answer choicesA regulatory protein that accelerates mRNA turnoverAn element that promotes termination of transcriptionAn extracellular inducer that controls gene expressionA DNA sequence to which RNA polymerase may bind
Solution
The best description for a promoter among the given choices is "A DNA sequence to which RNA polymerase may bind".
Here's why:
A promoter is a region of DNA that initiates transcription of a particular gene. It's located near the transcription start sites of genes, on the same strand and upstream. Promoters can be about 100–1000 base pairs long.
RNA polymerase binds to the promoter sequence and initiates transcription by unwinding the DNA strand and building a strand of RNA with a sequence complementary to the DNA.
So, a promoter is not a regulatory protein, it doesn't promote termination of transcription, and it's not an extracellular inducer that controls gene expression. It's a specific DNA sequence that RNA polymerase recognizes and binds to begin transcription.
Similar Questions
The promoter: A) Is an RNA sequence necessary for activating the transcription of a gene B) Is an RNA sequence necessary for activating translation C) Is a DNA sequence necessary for regulating the transcription of a gene D) Is the site of initiation of gene transcription E) Is a protein factor necessary for activating gene transcription
A. Leader sequence B. Promoter sequence C. Termination sequence D. Coding sequence E. DNA template 20. ___ site where RNA polymerase first binds during transcription 21. ___ sequence that RNA polymerase transcribes 22.___ sequence that contains the genetic information for a protein
Which of the following is NOT a form of gene regulation in eukaryotes?Group of answer choicesChanges to the DNA sequence that change the introns that are includedA small RNA binding to the mRNA from the gene and causing it to be degraded.Covalent modifications of DNA that keep the base pairing the sameBinding of proteins to the enhancers or silences to change the amount of mRNA produced
/ A group of structural genes with a single promoter, operator and terminator, is called A. 'n Regulon / A regulon B. 'n Operon / An operon C. 'n Repressor / A repressor D. 'n Induseerder / An inducerReset Selection
When a regulatory protein represses transcription at specific promoters, it is referred to as: Group of answer choicesPositive regulationAutoregulationInductionNegative regulation
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