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DNA stores information in a sequence of adenine, cytosine, guanine and thymine on a backbone of two deoxyribose molecules, which intertwine in a double helix. In nature, this information is read by RNA molecules and turn... More »

www.reference.com Science Biology Molecular Biology & DNA

Without DNA, life would not be able to perpetuate itself. DNA is needed as it is the blueprint of life. Every species of plants and animals contains a genetic substance called DNA that passes on the physical characterist... More »

www.reference.com Science Biology Molecular Biology & DNA

The primary purpose of DNA is to store hereditary information within the cells of all living things. It is a molecule that encodes the genetic instructions used in the development and functioning of all known living orga... More »

www.reference.com Science Biology Molecular Biology & DNA
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Adenine, guanine, cytosine and thymine are the four chemical bases found in DNA. In a given DNA molecule, adenine always pairs with thymine, and guanine always pairs with cytosine. More »

www.reference.com Science Biology Molecular Biology & DNA

The rungs of the DNA ladder consist of four nitrogenous bases: adenine, thymine, cytosine and guanine. Each rung of the ladder is composed of two of the nitrogenous bases held together by hydrogen bonds. More »

www.reference.com Science Biology Molecular Biology & DNA

The base pairing rules for DNA are governed by the complementary base pairs: adenine (A) with thymine (T) in an A-T pairing and cytosine (C) with guanine (G) in a C-G pairing. Conversely, thymine only binds with adenine ... More »

www.reference.com Science Biology Molecular Biology & DNA

Nitrogenous bases are the class of biological molecule to which guanine, adenine, cytosine and thymine belong. These nitrogenous bases combine with a five-carbon sugar and a phosphate group to form nucleic acids such as ... More »

www.reference.com Science Biology Molecular Biology & DNA