Cells can alter their chromatin structure by doing which of the following? Chemically modifying DNA via methylation Chemically modifying histones Changing the nucleotide sequence of DNA Shifting the position of nucleosomes with chromatin remodeling complexes
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ATP-dependent chromatin-remodeling complexes can do all of the following EXCEPT a. change the position of a nucleosome on DNA. b. render DNA less accessible. c. remove nucleosomes from DNA. d. replace some histones with variant forms of histone.
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Chromatin remodeling enzyme complexes _______________. Choose all that apply. A. ...are able to bind to the chromatin structure anywhere and cause DNA within a nucleosome to be repositioned. B. ...are non-histone proteins that can bind to the chromatin in interphase nucleus. C. ...bind to chromatin by binding to chemical modifications in the histone tails. D. ...cause DNA to be repositioned for access or tighter packing. E. ...are essential for regulating gene expression. F. ...promote the transition from the 30nm fibre to the 11nm fibre.
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What 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 sequence
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