You will be given a definition of a task first, then some input of the task.
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.

L1 ligase one of these objects was developed by Robertson and Elington. One of these objects creates a five prime lariat cap, increasing the half-life and therefore the fitness of a homing endonuclease. That object occurs in the gene I-DirI and is called the GIRI branching one. One of these objects is found in tobacco ringspot virus and is called "hairpin," and the B6. 61 one of these can add twenty nucleotides to a primer template before decomposing. The best known of these has invariant positions G12 and G8 serving as general base and general acid and can cleave between one base and an A, C, or U base. Many of these entities require divalent metal cofactors like magnesium, and most of them conduct their own hydrolysis or hydrolysis of similar structures, like the best-known Hammerhead one. FTP, name this class of RNA enzymes.
Output:
Science