BIOLOGY
5th Edition
ISBN: 9781265202859
Author: BROOKER
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Textbook Question
Chapter 14, Problem 3TY
Transcription factors that bind to DNA and stimulate transcription are
- a. repressors.
- b. small effector molecules.
- c. activators.
- d. promoters.
- e. operators.
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Which of the following is true of CpG islands?
a. They are methylated near promoters of actively transcribed genes.
b. They are unmethylated near promoters of actively transcribed genes.
c. Acetylation of CpG islands leads to repression of transcription.
d. CpG islands code for RNA molecules that activate transcription.
Transcriptional regulation often involves a regulatory protein that binds to a segment of DNA and a small effector molecule that binds to the regulatory protein. Do each of the following terms apply to a regulatory protein, a segment of DNA, or a small effector molecule?
A. Repressor
B. Inducer
C. Operator site
D. Corepressor
E. Activator
F. Attenuator
G. Inhibitor
Define the following terms: a. promoter b. consensus sequence c. operon d. chromatin-remodeling complex e. general transcription factors
Chapter 14 Solutions
BIOLOGY
Ch. 14.1 - Prob. 1CCCh. 14.2 - Which genes are under the control of the lac...Ch. 14.2 - With regard to regulatory proteins and small...Ch. 14.2 - What were the key observations made by Jacob,...Ch. 14.2 - CoreSKILL What was the eventual hypothesis...Ch. 14.2 - Prob. 3EQCh. 14.2 - Core Skill: Connections Look back at Fig 9.12....Ch. 14.2 - What are the advantages of having both an...Ch. 14.2 - Prob. 2CSCh. 14.3 - Prob. 1CC
Ch. 14.4 - What are the two opposing effects that histone...Ch. 14.4 - Prob. 1CSCh. 14.5 - Prob. 1CCCh. 14.5 - Prob. 2CCCh. 14 - Prob. 1TYCh. 14 - Prob. 2TYCh. 14 - Transcription factors that bind to DNA and...Ch. 14 - Prob. 4TYCh. 14 - For the lac operon, what would be the expected...Ch. 14 - Prob. 6TYCh. 14 - The trp operon is considered _____ blank operon...Ch. 14 - Prob. 8TYCh. 14 - Prob. 9TYCh. 14 - _____ blank refers to the process that allows a...Ch. 14 - Prob. 1CQCh. 14 - Transcriptional regulation often involves a...Ch. 14 - Prob. 3CQCh. 14 - Discuss the advantages and disadvantages of...Ch. 14 - Discuss the advantages and disadvantages of...
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- Eukaryotic cells have multiple complex mechanisms for the regulation of gene expression, but a regulatory mechanism they rarely (if ever) use is a. operons. b. regulatory proteins. c. transcriptional factors. d. promoters.arrow_forwardHistone deacetylase (HDAC) enzymes a.Promote initiation of translation. b.Complex with hyperphosphorylated pRb. c.Repress E2F family activity. d.Add acetyl groups to E2F promoters. e.Promote initiation of transcription.arrow_forwardChoose all items that regulate the transcription of mRNAs.Group of answer choices A. Transcription factor proteins B. Intron sequences C.. DNA promoter sequences D. DNA enhancer regions E. Exon sequencesarrow_forward
- Which of the following best explains how the prokaryotic expression of a metabolic protein can be regulated when the protein is already present at a high concentration? a.Repressor proteins can be activated and bind to regulatory sequences to block transcription. b.Regulatory proteins can be inactivated to increase gene expression. c.Transcription factors can bind to regulatory sequences to increase RNA polymerase binding. d.Histone modification can prevent transcription of the gene.arrow_forwardPositive regulators are called: A. Repressors B. Activators C. Enhancers D. None of the abovearrow_forwardRegulatory transcription factors can be modulated by a. the binding of small effector molecules. b. protein-protein interactions. c. covalent modifications. d. all of the above.arrow_forward
- Which of the following is not an example of constitutively expressed gene? a. genes for cell division and growth b. genes involved in DNA repair c. genes for cellular respiration d. genes that function in ATP synthesisarrow_forwardWhich 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.arrow_forwardChanges 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.arrow_forward
- Which of the following is not true regarding gene regulation that involves DNA bending? a. The precise distance between the regulatory sequence and the promoter is important. b. Effect can be to repress transcription c. Effect can be to activation transcription d. Regulated genes can be thousands of base pairs away from the regulatory sitesarrow_forwardGene expression regulation by methylation of the cytosines in a promoter would be considered : Select one: a. Translational regulation. b. Transcriptional regulation. c. Posttranscriptional regulation. d. Posttranslational regulation.arrow_forwardCombinatorial control refers to the phenomenon that a. transcription factors always combine with each other when regulating genes. b. the combination of many factors determines the expression of any given gene. c. small effector molecules and regulatory transcription factors are found in many different combinations. d. genes and regulatory transcription factors must combine with each other during gene regulation.arrow_forward
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