複選題19. Which of the following statement about CRIPSR-Cas9 is(are) NOT TURE? (A) A unique technology enables to edit gene by removing, adding or altering sections of the DNA sequence (B) A naturally occurred system in yeast (C) A guide RNA is needed. (D) Though it is extremely efficient, it is not site-specific gene editing. (E) Its discovery makes Emmanuelle Charpentier and Jennifer Doudna are awarded the 2020 Nobel Prize in Chemistry.