"fulfill functions" is correct and can be used in written English.
An example sentence might be: "The new program was designed to fulfill functions that the old software could not."
Yeast two-hybrid screenings in a heterologous invertebrate system identified dAbi, vinculin and tubulin as binding partners, representing molecules that fulfill functions in the cell architecture of many organisms.
The trend to hire contractors to fulfill functions deemed to be not essential to a company's basic business and the reduction in the number of white collar employees has made many companies unwilling to deal with separate service providers in hundreds of local markets.
In this sphere we do indeed "behave," "perform roles," and "fulfill functions," since we all obey the same imperatives.
Settlements within these areas are still arranged in an orderly fashion and fulfill functions determined by their proximity to both the city and the countryside.
Particular interest in this context can be provided with magnetic quantum dots with properties of artificial atoms [47, 48], which may have not only promising adsorption parameters but also fulfill functions of directional transport of cis-dichlorodiammineplatinum in local oncotherapy, intracellular optical sensors, etc.
Dsgs, however, also fulfill functions in signaling.
Automation devices, which are based on digital information processing fulfilling functions in a distributed system are an increasing market area.
To further confirm that these sequences fulfilled functions as E2F-regulated elements, their ability to activate a heterologous minimal promoter was assessed.
As such, they are fulfilling functions as frontline fighters, porters or sex slaves.
Second, rare bacterial community members are shown to fulfill essential functions while at low abundance.
Reinforced concrete structures must fulfill serviceability functions in terms of durability and bearing capacities.
