Apart from M.Sc, I guess she could join B.Tech/B.E. Biotechnology/Bio-chemical engineering, or even Chemical Engineering (Chemical requires at least one maths subject in B.Sc) via lateral (2nd year) entry scheme.
Or, she could do an MBA in any stream - some universities even offer MBA in Biotechnology I think, that would work fine and offer a good pay package. Or, if she is inclined towards software, she can do an MCA.