Histone acetyltransferases (hats) are capable of remodeling chromatin by adding acetyl groups to various lysine residues in histones that comprise the nucleosome. following this modification, the lysine residue no longer has a positive charge. which statement is true?
-histones in general have a net negative charge that allow them to bind to dna. acetylation of histones, decreases their positive charge and strengthens the histone--dna interaction
-histones in general have a net negative charge that allow them to bind to dna. acetylation of histones, decreases their positive charge and weakens the histone-dna interaction.
-histones in general have a net positive charge that allow them to bind to dna. acetylation of histones, decreases their positive charge and weakens the histone-dna interaction.
-histones in general have a net positive charge that allow them to bind to dna. acetylation of histones, decreases their positive charge and strengthens the histone-dna interaction.

Every compound can be represented by a chemical formula. a chemical formula is the set of symbols showing the elements that make up a compound and their proportions. water’s chemical formula is h 2 2 o. that means a molecule of water contains two atoms of hydrogen and one atom of oxygen chemically bonded. a molecule is a group of two or more atoms bonded together. molecules can range in size from two to thousands of atoms. a molecule of a compound is the smallest unit of that compound. every molecule of water has all the physical and chemical properties of water. that’s because every molecule of water is made of the same elements in the same proportions: two hydrogen atoms and one oxygen! which of the following is a true statement? a every molecule of the same compound will have different properties. b every molecule of a compound has the same proportion of elements. c molecules can be physically separated into smaller units of a compound. d molecules cannot be represented by chemical formulae.

Ais a landform that is formed at the mouth of a river from the deposition of sediment carried by the river as the water flows.

Tides that occur during the new and full moons