Biology 2e
2nd Edition
ISBN: 9781947172517
Author: Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher: OpenStax
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Textbook Question
Chapter 16, Problem 11RQ
Which of the following are true of epigenetic changes?
- allow DNA to be transcribed
- move histones to open or close a chromosomal region
- are temporary
- all of the above
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Students have asked these similar questions
Specific environmental or nongenetic factors can cause epigenetic modifications. Identical twins have essentially the same DNA sequences; however, aging and significant lifestyle differences cause changes in _____ because:
Genomic imprinting
Histone modification
Chromatin structure
DNA methylation
Which of the following is true about epigenetic modifications?
-Epigenetic modifications always repress transcription
-Epigenetic modifications are irreversible
-Epigenetic modifications only occur on the tails of histone proteins
-Epigenetic modifications influence the relationship between DNA and
histone proteins
Which of the following statements does not accurately complete this statement: An epigenetic trait _________.
can be passed from mother cell to daughter cell by mitosis
can be passed to the next generation by meiosis
is a change in the DNA sequence
causes changes in gene expression
All are accurate
Of the following, which is a good example of epigenetic changes?
methylation of DNA bases
addition of acetyl groups to histones
CpG islands
imprinting of genes
All are good examples of epigenetic changes
Chapter 16 Solutions
Biology 2e
Ch. 16 - Figure 16.5 In E. coli, the tip operon is on by...Ch. 16 - Figure 16.7 In females, one of the two X...Ch. 16 - Figure 16.13 An increase in phosphorylation levels...Ch. 16 - Control of gene expression in eukaryotic cells...Ch. 16 - Post-translational control refers to: regulation...Ch. 16 - How does the regulation of gene expression support...Ch. 16 - If glucose is absent, but so is lactose, the lac...Ch. 16 - Prokaryotic cells lack a nucleus. Therefore, the...Ch. 16 - The a/a operon is an inducible operon that...Ch. 16 - What are epigenetic modifications? the addition of...
Ch. 16 - Which of the following are true of epigenetic...Ch. 16 - The binding of _____ is required for transcription...Ch. 16 - What will result from the binding of a...Ch. 16 - A scientist compares the promoter regions of two...Ch. 16 - Which of the following are involved in post...Ch. 16 - Binding of an RNA binding protein will the...Ch. 16 - An unprocessed pre-mRNA has the following...Ch. 16 - IS. Alternative splicing has been estimated to...Ch. 16 - Post-translational modifications of proteins can...Ch. 16 - A scientist mutates elF-2 to eliminate its GTP...Ch. 16 - Cancer causing genes are called transformation...Ch. 16 - Targeted therapies are used in patients with a set...Ch. 16 - Name two differences between prokaryotic and...Ch. 16 - Describe how controlling gene expression will...Ch. 16 - Describe how transcription in prokaryotic cells...Ch. 16 - What is the difference between a repressible and...Ch. 16 - In cancer cells, alteration to epigenetic...Ch. 16 - A scientific study demonstrated that rat mothering...Ch. 16 - Some autoimmune diseases show a positive...Ch. 16 - A mutation within the promoter region can alter...Ch. 16 - What could happen if a cell had too much of an...Ch. 16 - A scientist identifies a potential transcription...Ch. 16 - Describe how RBPs can prevent miRNAs from...Ch. 16 - How can external stimuli alter...Ch. 16 - Protein modification can alter gene expression in...Ch. 16 - Alternative forms of a protein can be beneficial...Ch. 16 - Changes in epigenetic modifications alter the...Ch. 16 - A scientist discovers a virus encoding a Protein X...Ch. 16 - New drugs are being developed that decrease DNA...Ch. 16 - How can understanding the gene expression pattern...
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- Which of the following is not a major mechanism of epigenetic change? a. DNA methylation b. Alteration of a DNA base sequence in a promoter c. Histone acetylation d. Action of RNA moleculesarrow_forwardEpigenetic marks regulate gene expression. Which epigenetic mark is NOT associated with positive gene expression? Histone acetylation Histone Methylation De-methylated DNA Methylated DNAarrow_forwardWhich of the following is a correct statement about epigenetics? Group of answer choices Increased methylation of histones = decreased gene expression Decreased acetylation of histones = increased gene expression Adenine nucleotides are often directly methylated in vertebrate genomes Guanine nucleotides are often directly acetylated in vertebrate genomesarrow_forward
- Epigenesis relating to genetics refers to which of the following A. Genetic information is limited to what we inherit only from our biological parents. B. Genes are not influenced by environmental factors. C. Genes we inherit are fully expressed at birth. D. Genes are turned on or off as needed, by the developing body or environmental triggers, across the life-spanarrow_forwardWhich of the following is an example of epigenetic modulation? a) Ionization-induced DNA damage b) Single nucleotide polymorphism (SNP) c) Free-radical induced DNA damage d) Histone modifications of DNAarrow_forwardWhich of the following could represent an epigenetic modification in a cell? A. Deletion of chromosome 18 B. Acetylation of histone H3 C. Deletion of a 20-nucleotide segment of chromosome 3 D. Conversion of an A to a T within a gene E. Duplication of chromosome 13arrow_forward
- Why is it difficult to study whether a trait is due to epigenetic changes or due to something else? (Hint: What are the other things that may cause disease?) (Minimum of 2 complete sentences.)arrow_forwardTransmission of information that is not contained within the sequence of DNA to daughter cells at cell division is called epigenetic inheritance. true falsearrow_forwardWhat are epigenetic modifications? a. the addition of reversible changes to histone proteins and DNA b. the removal of nucleosomes from the DNA c. the addition of more nucleosomes to the DNA d. mutation of the DNA sequencearrow_forward
- Define Epigenetic changes. Are epigenetic changes the same thing as mutations? Explain why or why not.arrow_forwardWhich of the following is not a possible outcome of changing the epigenetic code? a) exposure of regulatory region b) binding of transcription factors c) altered gene expression d) repositioning of nucleosomes by polymerasesarrow_forwardGenes can be silenced through epigenetic changes that occur Genes can be silenced through epigenetic changes that occur at CpG islands located in RNA. at the C-terminus of histone tails. at lysines located in the nucleic acids sequence. at regulatory regions in DNA.arrow_forward
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