With bad results, you probably wont get into pure science stream but you can appeal for the pure science stream in the first few weeks of school. Usually, they do have spaces in the pure science classes because of the students going for the 'sekolah berasrama penuh'. With that in mind, you probably should appeal to enter into the pure science classes if you really want to but sub-science should be okay as well(biology replaced by accounts).

yay I got straight A's(7) in my PMR 2004