No. A very important point to remember is that there is no negative marking. So, once you reach the end of the section if you haven't answered every question or attempted every question then absolutely go back and answer. You have roughly twenty percent chance of getting it right just by guessing so please save 30 seconds to a minute at the end to go back and make sure that you have an answer entered for every single question.
Dr. Jason Dickenson
Director, India Testing- Law School Admission Council (LSAC)