What is the relationship between a template strand of DNA, mRNA and an amino acid?

The relationship between these three molecules is: mRNA is complementary to the template DNA and is responsible for regulating which amino acids are required for the formation of a given protein.

Explanation:

Messenger RNA (mRNA) has the function of guiding the synthesis of proteins, structures whose central role in all living beings is the manifestation of the inherited characteristics contained in DNA. This protein synthesis is driven by mRNA regulation that indicates the amount of amino acids required for synthesis. MRNA is synthesized from a DNA template strand, complementary to template DNA, and free ribonucleotides through the process of gene transcription. The segments of the template DNA for mRNA synthesis are located on several cell chromosomes, most often separated by long segments of noncoding DNA.