Chromosomes are threadlike structures made of

A) serotonin molecules.
B) epigenetic molecules.
C) DNA molecules.
D) dizygotic molecules.

Chromosomes

Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of deoxyribonucleic acid (DNA), carrying genetic information in the form of genes.

DNA Molecules

The carriers of genetic information in living organisms, consisting of two long strands forming a double helix.

Epigenetic Molecules

Molecules that can modify the structure of DNA or its surrounding environment, thereby affecting gene expression without altering the DNA sequence itself.