I've sent MOE an enquiry about this matter, the following is
their reply:
We refer to your email that was sent to us on 28 February
2012.
We are sorry to inform you that for both Pure Biology and
Combine Science (Biology/ Chemistry) cannot be used for the
computation of aggregate point.
Should you have any further enquiries email us at [email protected].
Alternatively, you may speak with our Customer Service
Executives at 6872 2220 (Mondays to Fridays: 8am to 6pm and
Saturdays: 8am to 1pm) or call +65 6872 2220 via your local
operator if you are calling from overseas.
Thank you.
Best Regards,
Ms Teo Yin Yin
Customer Services Branch, MOE
for PERMANENT SECRETARY (EDUCATION)