Majors

I will be going to a university next year. But I'm doubtful what concerns specialization in a specific subject, the only thing I'm currently certain about is that I will be joining the field of science.

Currently, my advance profile classes are these (I don't know how stuff works in the US, but we can only get specializations based on our AP classes, and getting into a university for me will not be hard because currently my grades are around the region of ~96-98%)

Mathematics, Biology, Chemistry and Physics.

I am currently highly interested in:
Biochemistry,
Bio engineering,
Mechanical Engineering,
Automation,
Molecular Biology.

Which one of these majors are the most interesting, or the most useful? Or would you prefer to choose something else yourself?

>>1
There's also Biophysics, lol. You might want to check this set of BME lectures from MIT if you're interested.

http://www.youtube.com/view_play_list?p=1AD80D1880B5BDB6

Pretty much you'll be trying to solve biological problems with an engineering approach. That's a hurr-durr out of the book definition isn't it? But seriously though, most of my classmates are in the program to become doctors or the like. Very few of them, I think, want to get in the industry of medical devices.

Just like many engineering majors, the road's tough. A good handful of my friends have already changed majors out of BME.