Alejandra Rosario’s enthusiasm for research is infectious. When she talks about studying cancer cells, or the possibility of getting a PhD, her face lights up. “It’s something I’m really passionate about,” she says. As a Bernard S. and Sophie G. Gould MIT Summer Research Program in Biology (BSG-MSRP-Bio) student this past summer in the lab of Matt Vander Heiden, MIT’s Lester Wolfe (1919) Professor of Molecular Biology, Rosario worked to understand cancer metabolism. MSRP-Bio is a 10-week, research-intensive summer program intended to introduce non-MIT undergraduates to a research career. Rosario,…