I am also considering going for a phd in chemical engineering. Congrats on the 3.9 in the bio major I have a 4.0 as a bio major, but im not one, it only consist of gen chem I and 2 bio 1 and 2 and orgo I. My cum gpa is 3.51 and chem E is 3.4 which is high in comparison to the other two people doing it haha . The bio major does not include mathematical physics, differentials, computer programming HTML, C++, binary, or java, calc 2, multivariable and linear algebra as the chem E does. Take those classes out and I guess I have a biology foundation. I would have to go back and take physics 1 and 2 though they should be relatively similar to the physics I took in high school as well as some upper division biology classes that sound horrible. Anyway chem E and bio are two different majors as music and physical education are. I am just curious how my course loads will be viewed. Right now I have 4 upper division chem/chem e course orgo II, thermodynamics, quantum mechanics (p-chem) and analytical chemistry with bio III (ecology).