Cells are constantly manipulating their DNA and histone proteins to regulate 

A. gene expression.
B. mutation formation.
C. crossing-over.
D. segregation.


A. gene expression.

Biology & Microbiology

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Which of the following procedures would be used to introduce DNA into a single mouse cell?

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Which of the following bacterial genera includes species that protect areas of the body such as the intestinal tract and the vagina from invasion by pathogens?

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Biology & Microbiology