Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 18, Problem 6TYK
DNA methylation of cytosine bases
- a. initiates the acetylation of histones.
- b. may be a mechanism of epigenetic inheritance when methylation patterns are repeated in daughter cells.
- c. increases the rate of transcription by loosening chromatin structure.
- d. increases the binding of inhibitors to distal control elements in an enhancer.
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In one cell, gene C is expressed, whereas in another cell, geneC is inactive. After the cells are fused experimentally, both copiesof gene C are expressed. This observation could be explained bya. a cis-epigenetic mechanism.b. a trans-epigenetic mechanism.c. DNA methylation.d. both a and b.
Insulators may exert their effect by
a. acting as a barrier to changes in chromatin structure.
b. blocking the effects of neighboring enhancers.
c. doing both a and b.
d. none of the above.
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A.The use of fluorescent protein expression inhibitors in other cells
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Chapter 18 Solutions
Study Guide for Campbell Biology
Ch. 18 - In the following diagram of the lac operon, an...Ch. 18 - a. Repressible enzymes usually function in _____...Ch. 18 - a. Give an example of highly methylated and...Ch. 18 - Label the components of the following diagram that...Ch. 18 - a. How is the process of alternate RNA splicing...Ch. 18 - a. Describe how miRNAs regulate gene expression....Ch. 18 - a. What is the difference between determination...Ch. 18 - What type of evidence established that Bicoid...Ch. 18 - a. List three genetic changes that can convert a...Ch. 18 - Complete the following concept map to help you...
Ch. 18 - Fill in the following table to help you organize...Ch. 18 - Prob. 3SYKCh. 18 - Prob. 1TYKCh. 18 - Prob. 2TYKCh. 18 - Prob. 3TYKCh. 18 - Prob. 4TYKCh. 18 - Prob. 5TYKCh. 18 - DNA methylation of cytosine bases a. initiates the...Ch. 18 - Which of the following is not true of enhancers?...Ch. 18 - Prob. 8TYKCh. 18 - A eukaryotic gene typically has all of the...Ch. 18 - Prob. 10TYKCh. 18 - Prob. 11TYKCh. 18 - Which of the following statements explains why a...Ch. 18 - Prob. 13TYKCh. 18 - Prob. 14TYKCh. 18 - Prob. 15TYKCh. 18 - Prob. 16TYKCh. 18 - What would be the fate of a Drosophila larva that...Ch. 18 - Prob. 18TYKCh. 18 - Prob. 19TYKCh. 18 - Prob. 20TYKCh. 18 - Prob. 21TYKCh. 18 - Prob. 22TYKCh. 18 - Prob. 23TYKCh. 18 - Which of the following would most likely account...
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- According to the histone-code hypothesis, what is one way that cell specialization occurs? a) Differential DNA methylation patterns b) Variation in enhancers in different cells c) TFII transcription factors binding to different histones in a cell-specific manner d) Differential expression of histone modifying enzymes e) Different histones are expressed in different cellsarrow_forwardThe key to epigenetic regulation is ________. a. controlling accessibility to transcription factors and RNA polymerase binding b. biochemical modification of binding factors c. physical modification of the DNAarrow_forwarda) What is a gene promoter? b) What proteins bind to a promoter? c) What do those proteins do to control gene expression?arrow_forward
- Describe in detail the role of super-enhancers. Give some examples. How the super-enhancers can be identified?arrow_forwardSuggest a direct experiment to prove that p53 binding at gene promoters affects the level of gene expression of the corresponding genes.arrow_forwardGive typing answer with explanation and conclusion What characteristics of the DSX protein enable the female- and male-specific isoforms of DSX to regulate the same genes but with different outcomes in female and male development? [multiple answers possible] A.The two isoforms are different alleles of the same gene B.The two isoforms have different DNA-binding domains C.The two isoforms are lncRNAs involved in dosage compensation D.The two isoforms differ in their activation domain E.The two isoforms share the same activation domain F. The two isoforms share the same DNA-binding domainarrow_forward
- Explain in detail the role of super-enhancers. Give some examples. How the super-enhancers can be identified?arrow_forwardWhich of the following is NOT a description of an epigenetic modification? A. regulatory patterns that persisis in the absence of the original signal B. stable alterations in gene expression without changes to the underlying DNA sequence C. the persistence of gene expression patterns through cell division D. an intrinsic signal that triggers cell differentiationarrow_forwardIf a mutation occurred in a control element sequence associated with a particular gene, which of the following would be a likely consequence of this? A. This mutation is not likely to affect the expression of the associated gene, because RNA polymerase does not bind to control elements. B. This will likely affect the expression of the associated gene because it will loosen the coiling of chromatin at this site. C. The expression of the associated gene will be affected because this change will result in a nonsense mutation. D. This mutation is not likely to affect the expression of the associated gene, since control elements are noncoding sequences. E. The associated gene's expression would likely be affected, since this mutation would change the ability of at least one transcription factor to bind.arrow_forward
- Through alternative splicing, eukaryotes (a) reinforce gene inactivation (b) prevent transcription of heterochromatin (c) produce related but different proteins in different tissues (d) amplify genes to meet the requirement of high levels of a gene product (e) bind transcription factors to enhancers toactivate transcriptionarrow_forwardA mutation occurs in a gene, resulting in it being expressed at the wrong time during development. Where is the mutation most likely to be found? a) In the transcription start site (TSS) b) In a TF binding site in the cis-regulatory region c) In the coding sequence d) In the 5' UTRarrow_forwardQ. Which of the following describes the role of acetylation during the chromatin remodeling that accompanies gene expression? A. It adds an acetyl group to the DNA of a promoter sequence. B. It adds an acetyl group to the histone protecting the promoter region of a gene. C. It adds an acetyl group to the cyotsine nucleotides of DNA. D. It adds an acetyl group to the histone protecting the transcription unit of a gene.arrow_forward
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