DNA is fundamental to the biology of all life on Earth, but how many of us actually know what it is or what it's made of?

The cells of all organisms contain genetic information in their DNA as a two-base-pair sequence made up of four molecules – A, T, C, G (Adenine, Cytosine, Thymine, and Guanine).

Double-stranded DNA consists of two polynucleotides that are arranged such that the nitrogenous bases within one polynucleotide are attached to the nitrogenous bases within another polynucleotide ...

Thousands of times thinner than one of the hairs on your head, a strand of DNA consists of three chemical building blocks: a sugar group, a phosphate group, and one of four nitrogen-containing bases.

DNA consists of two strands, that wind around each other. Each strand has repeating units of a nitrogenous base, deoxyribose sugar, and a phosphate group. There are several interactions present ...

The nitrogen bases in DNA are the basic units of genetic code, and their correct ordering and pairing is essential to biological function. The four bases that make up this code are adenine (A), ...

DNA, or deoxyribonucleic acid, is fundamental to your growth, reproduction, and health. Read about its basic function and structures.

After the primer is in place on a single, unwound polynucleotide strand, DNA polymerase wraps itself around that strand, and it attaches new nucleotides to the exposed nitrogenous bases.

It is possible that mistakes were made along the way -- in other words, that a base pair in one DNA molecule doesn't match the corresponding pair in the other molecule.

Cytosine is one of the four main nitrogenous bases found in DNA and RNA, along with adenine (A), guanine (G), and thymine (T) or uracil (U). It is a pyrimidine derivative, meaning it has a single-ring ...