Given the task definition and input, reply with output. In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

The dihedral angles between these compounds can be represented using a Ramachandran plot and they are bound to enzymes called aaRS. They were created in an experiment that passed sparks through a flask containing water, methane, ammonia and hydrogen and are represented by a three nucleotide long codon. tRNA is so named because it transfer these compounds to the ribosome. These compounds were created in the Miller-Urey experiment and their only achiral member is glycine. For 10 points, name this group of compounds that form the building blocks of proteins.
Science