Bioinformatics science is one of pioneer field of the science that tries to discover different aspects of biological reaction based on statistical and mathematical models to create an artificial life for a high quality life
The most important parts of mathematics as far as bioinformatics is concerned is probability/statistics and discrete mathematics/combinatorics. As was stated earlier though, the value of mathemtics is more the mindset: abstracting problems, finding analogous problems for which a solution is already known.