Final answer:
SWI/SNF complexes remodel chromatin by moving nucleosomes using ATP, which is crucial for gene expression regulation and can be linked to diseases when dysfunctional.
Step-by-step explanation:
The complexes that remodel chromatin by moving nucleosomes using ATP in the process are the SWI/SNF complexes. These complexes are essential for the regulation of gene expression by altering chromosomal structure and allowing transcription factors and RNA polymerase to access DNA. Chromatin remodelers like SWI/SNF are critical in the regulation of transcription and can play a role in various biological processes including development and differentiation, and their malfunction can be associated with several diseases, including cancer.