1) SQA Highers: AAABB. Five Highers, including Chemistry, and two of Biology, Mathematics, Physics. Chemistry and one other science required at A Grade. Five Highers must be taken in S5. Chemistry and another science subject (preferably Biology) at AH, at Grade B.
2) GCE A Levels: AAB. Chemistry (A Grade), Biology and either Mathematics or Physics at A level. ABBB in Chemistry (A), Biology, Physics and Mathematics. If Physics has not been studied at A level a good pass is required at GCSE level.
3) IB: Overall score of 36 points (including TOK/EE) to include Grades of 666 in HL Chemistry, Biology and Mathematics or Physics. Where HL Mathematics or Physics is not possible, another subject at HL may be accepted plus 6 at SL Mathematics or Physics.