I am only going to be able to fit either Physics 2 or Biochemistry in before submitting my application. Which is the better class to take first? (The other I will have to take during my gap year). Thanks.
Definitely physics 2. It's a required prerequisite course for most dental schools. I'd list physics 2 on your application prior to submitting it so they know at least it's in progress.
Physics 2 is a prerequisite at pretty much all schools.
Biochem is a prerequisite at some (an increasing number of) schools.
Biochem will help you a lot more on the bio section of the DAT but you need to have physics done. A lot of schools just require that you take biochem before you matriculate.
Honestly it depends which course will get you a better grade. As sad as it sounds, your GPA is vital to your success to getting accepted to dental school. If both classes are the same level of difficulty, I would have to say Biochem because biochem is a course you take in dental school. You dont need to take physics while in Dental school.