Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 11, Problem 10TY
The conversion of euchromatin into heterochromatin involves
- a. the formation of more nucleosomes.
- b. the formation of less nucleosomes.
- c. a greater compaction of loop domains.
- d. a lesser compaction of loop domains.
- e. both a and c.
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Students have asked these similar questions
Which 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 methylated
A cell is homozygous for a LOF mutation in the histone acetyltransferase (HAT) gene. Which of the following is/are true?
a. Chromatin in the cell will be more condensed than usual, decreasing expression of genes that should be expressed.
b. This will lead to histones with more positive charges on their tails, increasing the interaction between histones and the DNA backbone.
c. This will lead to a decrease in DNA methylation and therefore cause an increase in gene expression.
d. Chromatin in the cell will be less condensed than usual, increasing expression of genes that should not be expressed.
Which 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 machinery
Chapter 11 Solutions
Biology
Ch. 11.1 - Prob. 1CSCh. 11.1 - Prob. 1EQCh. 11.1 - Prob. 2EQCh. 11.1 - CoreSKILL In the experiment of Avery, MacLeod,...Ch. 11.2 - Prob. 1CCCh. 11.2 - Prob. 2CCCh. 11.2 - Core Skill: Modeling The goal of this modeling...Ch. 11.2 - Prob. 2CSCh. 11.3 - If this experiment was conducted for four rounds...Ch. 11.4 - Molecular Mechanism of DNA Replication Concept...
Ch. 11.4 - Prob. 2CCCh. 11.4 - Prob. 3CCCh. 11.4 - Prob. 4CCCh. 11.5 - Prob. 1CCCh. 11.5 - Prob. 1CSCh. 11 - Why did researchers initially believe that the...Ch. 11 - Prob. 2TYCh. 11 - Which of the following equations is accurate...Ch. 11 - Prob. 4TYCh. 11 - Which of the following statements about the...Ch. 11 - Meselson and Stahl were able to demonstrate...Ch. 11 - During replication of a DNA molecule, the daughter...Ch. 11 - Prob. 8TYCh. 11 - A nucleosome is a. a dark-staining body composed...Ch. 11 - The conversion of euchromatin into heterochromatin...Ch. 11 - What are the four key criteria that the genetic...Ch. 11 - A double-stranded DNA molecule contains 560...Ch. 11 - Prob. 3CQCh. 11 - Prob. 1COQCh. 11 - CoreSKILL How might you provide evidence that DNA...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- All of the following regarding ribosomes are true EXCEPT: A. Ribosomes are comprised of protein and RNA. B. Ribosomes coordinate with initiation and elongation factors to regulate translation. C. Ribosomes bind transcripts in their promoters. D. Prokaryotic ribosomes are comprised of a large and a small subunit. E. Ribosomes in eukaryotic cells bind to complete transcripts.arrow_forwardHDAC's are important enzymes involved in the regulation of Gene expression. This is because a. They create the Z form of DNA by removing acetyl groups from cytosines. b. they create euchromatic structure by adding acetyl groups to cytosine. c. they add methyl groups from histones creating less gene expression. d. they remove acetyl groups from histones creating less gene expression. e. they add methyl groups onto cytosines on DNA and create a heterochromatic structure.arrow_forwardWhich of the following may produce more than one functional protein from an mRNA transcript?a. chromatin condensation b. transcriptional regulation c. epigeneticsd. alternative mRNA processingarrow_forward
- Loosening the chromatin structure occurs because of Select one: a. Lysine methylation b. Lysine acetylation c. Lysine phosphorylation d. Lysine sumoylationarrow_forwardYou are investigating the transport of proteins into the ER in various mutant cells. Where would you expect to find ER proteins in a cell in which the gene encoding TOM proteins have been knocked out? a. Proteasome b. Cytoplasm c. Mitochondria d. nucleus e. ERarrow_forwardWhich of these is NOT true of nucleosomes? A. Some post-translational modifications to histone proteins serve as binding sites for transcription factors. B. The position of nucleosomes is fixed on the genome and can not be changed. C. The position and post-translational modifications of histones can be inherited through mitosis. D. The binding between DNA and histone proteins can be disrupted by post-translational modifications.arrow_forward
- Histones form more accessible chromatin because of Select one: a. Reduced electrostatic attraction between the histone and the negatively charged DNA backbone b. Increased electrostatic attraction between the histone and the negatively charged DNA backbone c. Reduced covalent bonding between the histone and the negatively charged DNA backbone d. Increased covalent bonding between the histone and the negatively charged DNA backbonearrow_forwardAn increase in HDACS can lead to which of the following? A. Increase in deacetylation of histones. B. Decrease in transcription. C. Increase in heterochromatin state. D. All of the above.arrow_forwardIn eukaryotes, chromatin remodeling plays an important role is gene regulation. This is because a. repositioning of the nucleosomes makes DNA accessible to transcription regulatory proteins b. the nucleosomes contain important regulatory regions c. chromatin remodeling activates gene expression d. chromatin remodeling represses gene expressionarrow_forward
- Arrange the statements in their proper order by writing the corresponding letter (e.g. A) for each statement in the space provided below. A. The single-stranded RNA would complement the target RNA. B. Gene expression is inactivated once the mRNA is no longer accessible for translation. C. The risk-induced silencing complex which is composed of RNA and protein subunits is formed. D. Double-stranded, non-coding RNA is cleaved by Dicer. E. The mRNA can be cleaved or remain bound by the RISC. 1. 2. 3. 4. 5.arrow_forwardMethylated cytosines may be associated with a. telomere repeats b. mutation hotspots c. centromere regions d. rancid breakfast cereal e. euchromatinarrow_forwardEuchromatin refers to regions of DNA that are loosely packed to increase the efficiency of transcription. Which of the following would you expect to find in a region of euchromatin? A. more thymines B. fewer thymines C. more histones D. fewer histonesarrow_forward
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