note that amino acids are the building blocks of proteins, not DNA. Also it's worth bearing in mind that DNA is a complex and fairly inert molecule, whereas RNA

note that amino acids are the building blocks of proteins, not DNA. Also it's worth bearing in mind that DNA is a complex and fairly inert molecule, whereas RNA or TNA are often catalytic, thus potentially both simpler to spontaneously originate as a standalone, self-replicating entity (life!)