Now I'm undergrad student, majoring in Physics. But I think I prefer to be a physical chemist and want to be a university lecturer in department of chemistry. My research field is molecular biophysics and I need to have a basic knowledge of organic chemistry and biochemistry, but now I'm in Physics department. I think I'm in the wrong way. What should I do? If I continue study BS in Physics, is it difficult to change to chemistry in MS and PhD? or is it better to change my major now? (I have to study 5 years to do that) (Sorry if my grammar is wrong. I'm Thai and I use English as the second language) Thank you.