Monash's biomed/eng double degree covers ALL pre-requisites needed for every pgrad course listed above (the ones after biomed@uom), aside from optometry which needs physics/optics or something.
The second year anatomy, physiology, biochemistry units needed for dentistry, medicine etc are covered, 100% sure
So if you decide to end up doing eng, monash is 4 years, melb is 6
with medicine and those pgrad courses, monash and melb courses converge and you end up with same course anyway.
so if you're unsure, i'd say biomed/eng cos then you can get a taste of both at the same time before you pick one, whereas at melb, you don't get to taste eng until you enter into the pgrad and then if you don't like it, you'll waste more time and money transferring out