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Description: Promoters are DNA sequences a. near a transcription start site b. bound to a repressor protein c. that inhibit transcription of a gene d. that stimulate ncRNA activity

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Biochemistry

Promoters are DNA sequences a. near a transcription start site b. bound to a repressor protein c. that inhibit transcription of a gene d. that stimulate ncRNA activity

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter14: Gene Regulation

Section: Chapter Questions

Problem 10TYU: Which of the following is an example of positive control? (a) transcription occurs when a repressor...

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Binding of _______ to _______ in DNA can increase the rate of transcription of specific genes. a. activators; repressors c. repressors; operators b. activators; enhancers d. repressors; enhancers
In a bacterial operon, the active repressor bind to the A. promoter. B. terminator. C. operator. D. regulator.
In gene silencing, the “dicer” enzymea. assembles siRNAs into a RISC complex.b. unwinds the RISC complex.c. binds siRNA to mRNA sequences complementary to it.d. slices up double-stranded RNA molecules
Proteins that influence RNA synthesis by binding directly to DNA are called_____ . a. promoters c. operators b. transcription factors d. enhancers
What will result from the binding of a transcription factor to an enhancer region? a. decreased transcription of an adjacent gene b. increased transcription of a distant gene c. alteration of the translation of an adjacent gene d. initiation of the recruitment of RNA polymerase
Which of the following is true of transcription factors? A)The same transcription factors are found in all cell types. B)They can increase or decrease gene expression. C)They are a type of cis-acting element. D)They bind only to promoters.
Changes in a cell that affect micro RNAs lead to cancer because miRNAs... a. help a cell to maintain a tight control on protein levels in a cell. b. decrease the level of a specific protein. c. increase the level of a specific protein. d. prevent the Warburg effect.
What is the difference between the core promoter and the regulatory promoter? a. Only the core promoter has consensus sequences. b. The regulatory promoter is farther upstream of the gene. c. General transcription factors bind to the core promoter; transcriptional activator proteins bind to the regulatory promoter. d. Both b and c.
The effect that cAMP has on CAP is that a. it causes LacI to bind a promoter. b. it causes CAP to stabilize RNA polymerase binding of a promoter. c. it causes TrpR to bind a promoter. d. it causes RNA polymerase to not bind a promoter.
How do repressors reduce transcription of an operon? A) recruit RNA polymerase to promoters B) block the ability of RNA polymerase to bind a promoter C) break phosphodiester bonds in the DNA D) inhibit the activity of the ribosome
Which of the following statements about gene regulation is false? a. An operon contains DNA sequences that regulates its own expression. b. The operator region can only be bound by an activator protein. c. Transcription factors can affect the binding of RNA polymerase to the promoter. d. A repressor is a transcription factor that hinders gene transcription.
how does the E.coli RNA polymerase find the gene's promoter to be transcribed? A. the TATA sequence. B. the sigma factor C. the apoenzyme D. the -35 sequence