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Why is DNA called the blueprint of life?

Answer
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Hint: This molecule has the ability to reproduce itself and can serve as a template for the production of amino acids. Such characteristics may be seen in all forms of life, including the smallest ones like bacteria. The double helix structure of DNA allows it to reproduce itself.

Complete answer:
During cell division, the DNA molecule divides longitudinally, with each half serving as a template for simpler molecules to bind to until each half is once again a double helix. Adenine, Thymine, Cytosine, and Guanine are the four types of simple molecules that make up DNA. They are abbreviated A, T, C, and G, which stand for Adenine, Thymine, Cytosine, and Guanine, respectively.
These are grouped in specific and noteworthy sequences. The only viable pairings for each base are A+T, T+A, C+G, and G+C; that is, a "A" on one strand of double-stranded DNA would "mate" properly only with a "T" on the other, complementary strand.
During cell division, the DNA molecule divides longitudinally, with each half serving as a template for simpler molecules to bind to until each half is once again a double helix. Adenine, Thymine, Cytosine, and Guanine are the four types of simple molecules that make up DNA. They are abbreviated A, T, C, and G, which stand for Adenine, Thymine, Cytosine, and Guanine, respectively.
Because each strand of DNA has a directionality, the sequence order does matter: A+T is not the same as T+A, and C+G is not the same as G+C; there is only one possible complementary base for each given base, so naming the bases on the conventionally chosen side of the strand suffices to describe the entire double-strand sequence.
These amino acid sequences on the very long DNA molecule specify how different amino acids are ordered in a protein and how much protein should be produced. A gene is a piece of DNA that contains the information for an unbroken manufacturing sequence.
Because DNA includes the instructions needed for an organism to grow, develop, live, and reproduce, it is known as the blueprint of life. DNA accomplishes this by regulating protein synthesis. Proteins are the basic unit of structure and function in organisms' cells, and they conduct the majority of the work in them.

Note: Uniqueness of DNA: In humans, DNA sequencing is a one-of-a-kind experience. Except in the rare occurrence of identical twins, no two persons will have identical DNA. However, more than 99 percent of the nearly three billion base pairs that make up the human genome are identical in all humans.
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