How Did Zhang and Cech Purify the RNA Molecules That

Multiple Choice

How did Zhang and Cech purify the RNA molecules that were able to catalyze the linkage between two amino acids?

A) passing the reaction mixture through a column that binds biotin
B) passing the reaction mixture through a column that binds all proteins
C) passing the reaction mixture through a column that binds RNA
D) centrifuging the reaction mixture to concentrate the proteins
E) centrifuging the reaction mixture to concentrate the RNA molecules