The Histone Code States That the

question 18

Multiple Choice

The Histone Code states that the

• A)primary sequence of the histone proteins never changes over time.
• B)combination of histone modification on a given nucleosome near a gene's control region affects the efficiency of transcription of that gene.
• C)combination of histone modification on a given nucleosome near a gene's control region affects the efficiency of transcription of all the nearby genes.
• D)lysines are the only amino acids found in histones that can be acetylated and deacetylated.
• E)histones are found in all living cells.

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Definitions:

Optically Active

Refers to a substance that is capable of rotating the plane of polarized light, indicating the presence of chiral molecules.

Bicyclic Compounds

Organic compounds that contain two fused or connected rings in their molecular structure.

Diene

Organic compounds containing two double bonds, which may participate in a variety of chemical reactions, especially polymerization.

Dienophile

A chemical compound that acts as an electron-deficient partner in Diels-Alder reactions, typically containing double or triple bonds.