I answered by describing a project where we were developing a novel protein expression system. Midway, we encountered inconsistent yield results. I outlined how I: Identified variables — Conducted controlled experiments to isolate the cause (media composition and incubation time). Collaborated cross-functionally — Worked with both upstream and downstream teams to troubleshoot. Applied data analysis — Used statistical tools to confirm trends and optimize conditions. I concluded by emphasizing how the experience taught me the value of persistence, interdisciplinary communication, and careful documentation in biotech research.