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RNA (Ribonucleic acid) more important than DNA (Deoxyribonucleic acid) in encoding and decoding of information and origin of life.
The Central Dogma of Biology where DNA makes RNA which further makes Proteins has been much revered in the past by Biologists. It has plagued many evolutionary and origin of life scientists for almost 40 years as to which among these three came first and created the other two. According to current research and understanding (RNA first world) the RNA has been deemed as the candidate of choice that formed first and was able to work as catalyst (ribozyme) in creating first proteins in accordance with the codon sequences in the RNA. Some scientists have been able to create portions of RNA in the lab by recreating conditions that are thought to be present during the possible origin of life in the so called "primordial soup of life". RNA's were then able to pair up and create DNA through changes in the bases and hydrogen bonding to secure the information for the synthesis of evolving pre-life forms. RNA's are also thought to be the first large molecular life forms, so to say in that they could evolve into DNA Virions) and back to RNA (virions) and help synthesize proteins (prions) to evolve into first membrane (proteins) enveloped viruses and later prokaryotic and eukaryotic life forms. Intelligence as we understand is the ability to encode, decode, retrieve and reproduce information needed to build structures that could reproduce and adapt (learn and survive) making RNA as a stronger candidate thean DNA as the central molecule thought to be the first intelligent living chemical evolving from less complex unintelligent matter.