A segment of DNA that provides the code for creating protein molecules is called a(n)

A) organic methyl molecule.
B) epigenetic mark.
C) chromosome.
D) gene.

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all known living organisms.

Protein Molecules

Large biomolecules comprised of one or more long chains of amino acid residues which play critical roles in the body, including catalyzing metabolic reactions and DNA replication.

Epigenetic Mark

Alterations to DNA and histone proteins that influence gene activity without changing the DNA sequence itself.