Answer: Via four types of smaller molecules (adenine, cytosine, guanine, and thymine) called nucleotides.
Step-by-step explanation:
DNA is the main molecule of life on Earth, it is present in the cells of all living beings, being responsible for storing the information necessary for its formation and reproduction. DNA is a double strand of nucleotides that twist to form a double helix with a rotational sense on the right.
Basically, the binding between two single strands of DNA, forming the double helix, occurs following a single rule, adenine always binds to thymine and cytosine always binds to guanine and vice versa. The DNA molecule is made up of smaller molecules called nucleotides. There are four types of nucleotides that make up DNA, they are adenine, cytosine, guanine, and thymine, represented by their first letter {A, C, G, T}, forming the DNA alphabet.