In this task, we ask you to rewrite a sentence in simple English without changing its general meaning. Essentially, you want to make the sentence easier to read by using simpler words, utilizing more straightforward sentence structures, and omitting non-essential information etc.
Q: What was then needed was a tool that would cut DNA at specific sites , rather than at random sites along the length of the molecule , so that scientists could cut DNA molecules in a predictable and reproducible way .
A:
They needed a tool to cut DNA at specific sites , rather than at random sites along the length of the molecule .