Test: GRE Subject Test: Biochemistry, Cell, and Molecular Biology

1.

Histone acetyltransferases (HATs) transfer acetyl groups from acetyl CoA to lysine residues on histones. What is the purpose of this transfer?

Facilitate phosphorylation of these lysines by kinases

Prevent DNA degredation by endonucleases

Signal for ubiquitin-mediated degredation of histones

Promote formation of euchromatin and increase gene expression

Prevent transcription factors from binding to DNA

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