The N-Terminal Tail of Histone H3 Can Be Extensively Modified

question 20

Multiple Choice

The N-terminal tail of histone H3 can be extensively modified, and depending on the number, location, and combination of these modifications, these changes may promote the formation of heterochromatin.What is the result of heterochromatin formation?

• A)increase in gene expression
• B)gene silencing
• C)recruitment of remodeling complexes
• D)displacement of histone H1

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Definitions:

Hydroxyapatite

Mineral with the empiric formula 3 Ca3(PO4)2 ∙ Ca(OH)2; the main mineral of bone and teeth.

Collagen

A protein that is the primary structural component of connective tissues in animals and the most abundant protein in mammals.

Proteoglycan

A large molecule made of protein cores with glycosaminoglycan chains, playing various roles in the structure and function of cells and tissues.

Hyaluronic Acid

Hyaluronic Acid is a viscous, glycosaminoglycan that is widely distributed throughout connective, epithelial, and neural tissues, known for its capacity to retain water and contribute to tissue hydration and lubrication.