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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Chapter 9, Problem 10TY
The conversion of euchromatin into heterochromatin involves
- the formation of more nucleosomes.
- the formation of less nucleosomes.
- greater compaction of loop domains.
- less compaction of loop domains.
- both a and c.
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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.
The nuclear matrix composition:
a. lamina, nucleosome
b. cortex, lamina,
c. nucleosome
d. lamina, interchromatin network
Heterochromatin consists of
a) region of euchromatin devoid of histones.
b) an AT-rich region occurs every 200 base pairs.
c) decondensed, transcriptionally active chromatin.
d) highly condensed, transcriptionally inactive chromatin
Chapter 9 Solutions
Principles of Biology
Ch. 9.1 - Look ahead to Figure 17.10. How does bacterial...Ch. 9.1 - Prob. 1TYKCh. 9.2 - Prob. 1CCCh. 9.2 - Prob. 2CCCh. 9.2 - Prob. 3CCCh. 9.2 - A nucleotide composed of deoxyribose, phosphate,...Ch. 9.2 - Prob. 2TYKCh. 9.2 - Prob. 3TYKCh. 9.3 - Prob. 1TYKCh. 9.3 - To determine the structure of DNA, Watson and...
Ch. 9.4 - Prob. 1CCCh. 9.4 - Prob. 1TYKCh. 9.4 - Prob. 2TYKCh. 9.5 - Prob. 1CCCh. 9.5 - Prob. 1TYKCh. 9.5 - Prob. 2TYKCh. 9.5 - Prob. 3TYKCh. 9.6 - Prob. 1CCCh. 9.6 - A nucleosome is composed of 146 bp or 147 bp of...Ch. 9.6 - After they have replicated and become compacted in...Ch. 9.6 - Prob. 1BCCh. 9.6 - Which of the following is the correct order for...Ch. 9 - What is/are the main component(s) of chromosomes?...Ch. 9 - Prob. 2TYCh. 9 - Prob. 3TYCh. 9 - Prob. 4TYCh. 9 - Of the following statements, which is correct when...Ch. 9 - Prob. 6TYCh. 9 - Prob. 7TYCh. 9 - Prob. 8TYCh. 9 - Prob. 9TYCh. 9 - The conversion of euchromatin into heterochromatin...Ch. 9 - What are the four criteria that the genetic...Ch. 9 - What are the key features of DNA that allow it to...Ch. 9 - PRINCIPLES A principle of bioloy is that structure...Ch. 9 - Prob. 1CBQCh. 9 - Prob. 2CBQ
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- Arrange the levels of chromatin packing from most "open" to most condensed (chromosome, loops, nucleosomes, heterochromatin, 30-nm chromatin fiber)arrow_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_forwardExplain the Conservation of Chromatin Structure.arrow_forward
- When the dna is relaxed in the cell and is all stringy and evenly spread throughout the nucleus, we call it _________arrow_forwardHeterochromatin and Euchromatin Have Which Different Histone modificationsarrow_forwardWhich one of the following statements about nucleosomes is false? a) The DNA double helix wraps around the nucleosome. b) The sequence of amino acid in a histone tail is altered during chromatin remodeling. c) A nucleosome is composed of 8 histone proteins; two copies of each type of histone. d) A large percent of the nucleosome is positively charged.arrow_forward
- What role do the following cellular components play in the storage,expression, or transmission of genetic information: (a)chromatin, (b) nucleolus, (c) ribosome, (d) mitochondrion, (e)centriole, (f) centromere?arrow_forwardWhich of the following statements most accurately represent chromatin state and transcription? Group of answer choices 1.Histone deacetylases promote closed chromatin and result in repressed transcription 2.Open chromatin is associated with hypoacetylation and has high levels of transcription 3.Histone acetyltransferases result in hypoacetylation and high levels of transcription 4.Hyperacetylation is associated with closed chromatin and low levels of transcriptionarrow_forwardDiscuss the levels of chromosomal organization with reference to the following terms: a. nucleotide b. DNA double helix c. histones d. nucleosomes e. chromatinarrow_forward
- 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 histonesarrow_forwardHeterochromatin has a less compact structure, whereas euchromatin is more compact and composed of an array of nucleosomes condensed into a fiber true or false?arrow_forwardChromatin is differentiated into heterochromatin and euchromatin regions, on the basis of staining behaviour in a typical nucleus. Which of the given statements is/are correct w.r.t. heterochromatin? (A) Lightly stained region (B) Chromatin is densely packed (C) Transcriptionally it is inactive (D) Darkly stained region 1. (A) only 2. (A) and (C) only 3. (A), (B) and (C) 4. (B), (C) and (D)arrow_forward
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