AP BIOLOGY

Detailed explanation-1: -All organisms use DNA to store genetic information (with the exception of some viruses). They all use the same four bases (G, A, C, and T-or U if you’re talking about RNA) and make the same amino acids. This is why DNA provides us with the universal genetic code.

Detailed explanation-2: -The genetic code is universal. All known living organisms use the same genetic code. This shows that all organisms share a common evolutionary history. The genetic code is unambiguous.

Detailed explanation-3: -The genetic code is nearly universal, and the arrangement of the codons in the standard codon table is highly non-random.

Detailed explanation-4: -Although each organism’s DNA is unique, all DNA is composed of the same nitrogen-based molecules. So how does DNA differ from organism to organism? It is simply the order in which these smaller molecules are arranged that differs among individuals.

Detailed explanation-5: -The genetic code, once thought to be identical in all forms of life, has been found to diverge slightly in certain organisms and in the mitochondria of some eukaryotes.