How do Princeton and Boston University compare for an undergraduate biology major?

Princeton has the edge for an undergraduate biology major, mainly because it offers a more intimate academic environment, unusually strong access to faculty, and a culture where independent research is built into the undergraduate experience. Its biology-related departments are excellent, undergrads are expected to complete substantial junior and senior independent work, and the smaller scale usually makes it easier to build close mentoring relationships.

One major difference is how undergraduate research is woven into the curriculum. At Princeton, independent work is not just an optional extra for ambitious students; it is a central part of the academic structure, and that matters a lot in biology. Students often get involved in lab work earlier than they might expect, and faculty mentoring tends to be a prominent part of the experience because the university is so focused on undergraduate teaching despite being a major research institution.

Another differentiator is class size and faculty access. Princeton’s undergraduate focus usually means smaller classes once you get beyond introductory sequences, and students often find it easier to know professors personally. That can make a real difference in biology, where recommendation letters, lab placement, and guidance about graduate school, medical school, or research pathways often depend on strong faculty relationships.

Boston University is still a serious option, especially if you want a larger university in a major city with extensive medical and research surroundings. BU gives biology students access to a broad scientific ecosystem, including connections to hospitals, labs, and biotech opportunities in Boston. The tradeoff is that the overall undergraduate experience can feel less personal at times, and students may need to be a bit more proactive about standing out, finding mentors, and navigating a bigger system.

BU may appeal more if you value the energy of an urban campus and want lots of nearby science and health-related opportunities. But for the specific combination of biology strength, structured undergraduate research, and close academic support, Princeton is the more compelling choice.