Histone acetyltransferases (HATs) are capable of remodeling chromatin by adding acetyl groups to various lysine residues in hist
ones 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.
The correct answer is "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".
Explanation:
Histone acetyltransferases (HATs) are regulators of gene activation and deactivation, achieved by the transference of an acetyl group from acetyl-CoA to histones. HATs function by the premise that 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. Therefore, most of the times histone acetylation increases gene expression, because the acetylated gene is free from the histones and is able to be encoded.
A wolf can be considered as both a secondary and primary consumer because they feed on both primary and primary and secondary consumers. As a secondary consumer, wolves can feed on plant eaters [primary consumers] such as elk which is an herbivore. As a tertiary consumer, wolf feed on secondary consumers such as deer.
The plates can be thought of like pieces of a cracked shell that rest on the hot, molten rock of Earth's mantle and fit snugly against one another. The heat from radioactive processes within the planet's interior causes the plates to move, sometimes toward and sometimes away from each other
