Principles of Biology
2nd Edition
ISBN: 9781259875120
Author: Robert Brooker, Eric P. Widmaier Dr., Linda Graham Dr. Ph.D., Peter Stiling Dr. Ph.D.
Publisher: McGraw-Hill Education
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Textbook Question
Chapter 12.4, Problem 1TYK
A chromatin-remodeling complex may
- change the locations of nucleosomes.
- exchange standard histones for histone variants.
- evict histones.
- do all of the above.
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Which of the following statements concerning eukaryotic chromatin is true.
Histones have an overall negative charge.
Euchromatin is more condensed then heterochromatin.
After replication nucleosomes are made up of a mixture of old and new histone proteins.
Euchromatin is associated with the centromere and telomere regions.
Heterochromatin are regions of active transcription.
Which of the following is likely to be transcriptionally expressed?
euchromatin and DNA with methyl groups
euchromatin
DNA with methyl groups
DNA with acetylated histones
euchromatin and DNA with acetylated histones
Loosening the chromatin structure occurs because of
Select one:
a. Lysine methylation
b. Lysine acetylation
c. Lysine phosphorylation
d. Lysine sumoylation
Chapter 12 Solutions
Principles of Biology
Ch. 12.1 - How does gene regulation underlie the different...Ch. 12.1 - Prob. 1TYKCh. 12.1 - The most common point of gene regulation in...Ch. 12.2 - Which genes are under the control of the lac...Ch. 12.2 - Prob. 2CCCh. 12.2 - Prob. 1BCCh. 12.2 - Prob. 1TYKCh. 12.3 - Prob. 1CCCh. 12.3 - Prob. 1TYKCh. 12.3 - Prob. 2TYK
Ch. 12.4 - Prob. 1CCCh. 12.4 - Prob. 1BCCh. 12.4 - A chromatin-remodeling complex may change the...Ch. 12.4 - Prob. 2TYKCh. 12.5 - What is the biological advantage of alternative...Ch. 12.5 - Prob. 2CCCh. 12.5 - Prob. 1TYKCh. 12.5 - Prob. 2TYKCh. 12 - Genes that are expressed at all times at...Ch. 12 - Prob. 2TYCh. 12 - Transcription factors that bind to DNA and...Ch. 12 - Prob. 4TYCh. 12 - Prob. 5TYCh. 12 - Prob. 6TYCh. 12 - Prob. 7TYCh. 12 - Prob. 8TYCh. 12 - Prob. 9TYCh. 12 - Prob. 10TYCh. 12 - What is the difference between inducible and...Ch. 12 - Transcriptional regulation often involves a...Ch. 12 - PRINCIPLES A principle of biology is that the...Ch. 12 - Discuss the advantages and disadvantages of...Ch. 12 - Prob. 2CBQ
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- A chromatin-remodeling complex may a. change the locations of nucleosomes. b. evict nucleosomes from DNA. c. replace standard histones with histone variants. d. do all of the above.arrow_forwardWhich of the following is associated with active chromatin? Check all that apply. A. Centromeres B. heterochromatin C. histone acetylation D. Polytene puffs E. metaphase chromasomes F. transcription of machineryarrow_forwardWhich region of chromatin is transcriptionally silent?a) Nucleoidb) Centromerec) Euchromatind) Heterochromatinarrow_forward
- Which of the following types of epigenetic changes may promote cancer?a. DNA methylationb. Covalent modification of histonesc. Chromatin remodelingd. All of the abovearrow_forwardWhich of the following statements is NOT true about chromatin architecture? A. The histone tails on heterochromatin are deacetylated B. Heterochromatin is heavily methylated C. Euchromatin is more likely to contain genes that are expressed at that time D. Euchromatin is heavily methylatedarrow_forwardDescribe the mechanism by which histone modifications are established after DNA replication and cell division. What are some things that could go wrong if modifications can't be maintained? Think about what histone modifications do to DNA and why cells maintain parts of their chromosome as heterochromatin.arrow_forward
- Small molecules binding to histone proteins also control gene expression by chromatin remodelling Group of answer choices No answer text provided. True No answer text provided. falsearrow_forwardLess condensed region of an interplase chromosome that stains diffusely. Which one Beads on a string Heterochromatin Histone Euchromatin Octamer nucleosomearrow_forwardDescribe how reversible chemical changes to DNA and histones are linked to chromatin modification.arrow_forward
- Discuss the levels of chromosomal organization with reference to the following terms: a. nucleotide b. DNA double helix c. histones d. nucleosomes e. chromatinarrow_forwardDiscuss histones and how methylation and acetylation of DNA and histones can affect the production of a protein. Include a picture to show acetylation of histones and how it affects chromosome condensingarrow_forwardIn which of the following processes is reverse transcriptase involved? More than one answer is correct. Options: Chromatin condensation. Transposition of a retrotransposon. Kinetochore assembly. Construction of a cDNA library. mRNA synthesis.arrow_forward
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