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Article: Replication
- Article from:
- Biology
- Author:
CopyrightCOPYRIGHT 2002 The Gale Group Inc. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
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Replication
There is no more critical issue in the origin of life than a method for the faithful and timely replication of genetic information. Genes are encoded in deoxyribonucleic acid (DNA), which is made of four types of
nucleotides
, distinguished by the bases adenine (A), guanine (G), cytosine (C), and thymine (T). When James Watson and Francis Crick discovered the double helical structure of deoxyribonucleic acid (DNA), they also recognized that DNA replication could occur by opening the double helix into single strands, and from those
templates
creating new
complementary
strands by the principle of
base pairing
. As an overview, their proposal was correct. The details of ...
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