My sis is aiming for Bio Engineering as well in NUS. I know the
requirement is only having H2 Chem.
Let me share my research:
1) There's lots of physics involved, especially in the modules
EG1108 Electrical Engineering, EG1109 Mechanics, PC1431 and PC1432.
People who took only Chem and Bio (no physics) will die here first.
This is coming from me who took an engineering major in NUS.
2) You need to be very strong in maths as well to get through
PC1431 and PC1432 in addition to MA1505 and MA1506. Your calculus
skills have to be damn power... I'm training my sis in old syllabus
C maths and F maths Mechanics now. Calculus will be used for
physics. This is also coming from me who took an engineering major
in NUS.
3) The later year modules, although sounding very bio, still
have a lot of relevance to physics.
You will not be significantly disadvantaged if you didn't take
H2 Bio as UltimaOnline said. But in my opinion, you will be
significantly disadvantaged if you didn't take H2 Maths and H2
Physics. There's a lot of relevance in the first year of
engineering, and it's a path that all engineers (perhaps with the
exception of Chem Engineering) have to go through.