Definition: This is the copying process by which a cell duplicates its DNA.

It is DNA replication.

Explanation: DNA replication is a process by which a DNA molecule is copied into two identical daughter DNA. In this process, the double stranded DNA is unwound by the enzyme known as helicase and each of the two separate strands act as a template for the synthesis of a new strand. DNA polymerase is the enzyme that catalyzes the synthesis of a new DNA strand from a template strand. A template is a structure that allows molecules to be lined up in a specific order and joined to create a macromolecule with a unique sequence and function. Each of the new strands produced is complementary to the template strand. Complementary strands do not have the same base sequence or composition rather complementary means that wherever adenine is found in the template strand, thymine is found in the new strand and wherever guanine occurs in the template strand, cytosine is found in the new strand.

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