The term 'GENETIC CODE CARRIERS' refers to the molecules that carry genetic information, which are DNA molecules. DNA stands for deoxyribonucleic acid and is composed of four nucleotides: adenine, guanine, cytosine, and thymine. These nucleotides form a double helix structure and are responsible for the transmission of genetic information from one generation to the next. DNA molecules are the primary carriers of genetic code, and they are found in all living organisms.