Which reaction is catalyzed by the DNA translocase enzyme found in all chromatin-remodeling complexes? Multiple choice question. DNA methylation ATP hydrolysis Histone methylation Histone acetylation
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DNA translocase enzymes are involved in the movement of DNA and nucleosomes, which is essential for chromatin remodeling. Show more…
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4) The chromatin remodeling complex uses the energy from ATP hydrolysis to catalyze _____________________________. (a) the sliding of nucleosomes along DNA. (b) acetylation of a histone tail. (c) the binding of histone H1 to the linker DNA. (d) the initiation of replication.
Shaiju T.
Which of the following best describes the mechanism by which chromatin-remodeling complexes "loosens" the DNA wrapped around the core histones? They use energy derived from ATP hydrolysis to change the relative position of the DNA and the core histone octamer. They chemically modify the DNA, changing the affinity between the histone octamer and the DNA. They remove histone H1 from the linker DNA adjacent to the core histone octamer. They chemically modify core histones to alter the affinity between the histone octamer and the DNA. Which of the following statements about nucleosomes is true? Nucleosomes activate transcription when bound to the promoter. Although RNA polymerase can access DNA packed within nucleosomes, the general transcription factors and transcriptional regulators cannot. Histone acetyltransferases affect transcription covalently modifying histones. This can alter chromatin structure to allow accessibility to the DNA and by adding acetyl groups to histones that can bind proteins that promote transcription. Histone deacetylases remove lysines from histone tails.
John N.
Chromatin remodeling by the SWI/SNF complex requires hydrolysis of ATP. What purpose does this serve?
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