Here's how it works:
* DNA Replication: This is the process of copying DNA. It happens before a cell divides so that each new cell gets a complete set of genetic instructions.
* Base Pairing: DNA is a double helix with two strands held together by complementary base pairs: adenine (A) pairs with thymine (T), and guanine (G) pairs with cytosine (C).
* Template Role: During replication, the two strands of the DNA molecule separate. Each strand then acts as a template for the synthesis of a new complementary strand.
* Enzymes: Special enzymes like DNA polymerase read the template strand and add the correct complementary nucleotides to build the new strand.
So, the original DNA molecule acts like a blueprint, and each strand provides the instructions for building a new, identical DNA molecule.