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Euchromatin

Types of chromatin

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Biology
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Biology
Genetics
Epigenetics
Molecular genetics
Proteins
Molecular biology
Chromatin
Histone
Nucleosome
Euchromatin
Heterochromatin
DNA

Chromatin: Types of chromatin Chromatin In non-dividing cells, the DNA exists as chromatin and appears uncoiled and randomly dispersed After DNA replication (S phase) the chromatin begins to condense in preparation for mitosis Chromatin consists of 50% DNA, 50% proteins, mainly histones Chromatin is the structure that the eukaryotic genome is packaged into It allows long molecules of DNA to fit into the small volume of the nucleus The basic structural unit of chromatin is the nucleosome Further folding and compaction of chromatin produces visible metaphase chromosomes during cell division Heterochromatin vs Euchromatin Euchromation Active Chromatin The majority of chromatin is this form Less condensed, lightly packed in the nucleus (basic ?beads on a string? form ?check)

AP Bio Campbell 7E Chapter 19 Test Bank

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Genetics
Molecular genetics
Epigenetics
Gene expression
Molecular biology
Chromatin
Euchromatin
Histone
Nucleosome
DNA
Transcription factor
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Ch 19 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. ____ 1. The condensed chromosomes observed in mitosis include all of the following structures except a. nucleosomes. b. 30-nm fibers. c. 300-nm fibers. d. looped domain. e. ribosomes. ____ 2. Under the electron microscope, unfolded chromatin resembles "beads on a string." What do the "beads" represent? a. nucleosomes b. ribosomes c. beadosomes d. molecules of DNA polymerase e. molecules of RNA polymerase ____ 3. In a nucleosome, what is the DNA wrapped around? a. polymerase molecules b. ribosomes c. mRNA d. histones e. nucleolus protein

Gene Regulation powerpoint

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Biology
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Biology
Genetics
RNA
Gene expression
Molecular genetics
Epigenetics
RNA interference
Euchromatin
Regulation of gene expression
Polyadenylation
Chromatin
Messenger RNA
health
behavior
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Psychoanalysis
Human behavior
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Chapter 18: Regulation of Gene Expression Correlations to AP Bio Course Curriculum See Unit 3 Essential Knowledge document for all EK statements for Chapter 18. Correlations to AP Bio Course Curriculum Learning Objective 3.18: The student is able to describe the connection between the regulation of gene expression and observed differences between different kinds of organisms. Learning Objective 3.19: The student is able to describe the connection between the regulation of gene expression and observed differences between individuals in a population. Correlations to AP Bio Course Curriculum Learning Objective 3.20: The student is able to explain how the regulation of gene expression is essential for the processes and structures that support efficient cell function.
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