I did my literature GCSE in 2018 and I absolutely hated Jekyll and Hyde (hated the entire GCSE but I especially disliked that book) but you just need to go through the book and figure out how science is portrayed. Jekyll doesn't listen to anyone and relentlessly continues with his experiment. It goes badly wrong. Lanyon fears the experiment and dies of shock at some point. You obviously need quotes to back up your points (use embedded quotes, don't write something like "the quote ".." shows that...").
You need to connect it to the context of the book - it was written in the Victorian era. People were still overly religious and scared of scientific advancements. Think about how people reacted to Charles Darwin's theory a few decades earlier.