The burning of fossil fuels by humans is the largest source of emissions of carbon dioxide, which is one of the greenhouse gases that allows radiative forcing and contributes to global warming.
The genetic code. Efforts to understand how proteins are encoded began after DNA's structure was discovered in 1953. George Gamow postulated that sets of three bases must be employed to encode the 20 standard amino acids used by living cells to build proteins, which would allow a maximum of 43 = 64 amino acids.
Best Answer: DNA has four letters, ACGT. strings of these letters code for strings of amino acids-of which we have 20-these 20 amino acids make up all the proteins in our bodies. DNA is the repository for all the data needed to make these amino acids. using RNA as an intermediate, each string of 3 DNA letters codes for one amino acid. long strings of amino acids hooked together make up proteins.