<prompt> Hexokinase isLigaseTransferaseOxidoreductaseReductase  <response>: A hexokinase is an enzyme that phosphorylates hexoses six-carbon sugars, forming hexose phosphate. In most organisms, glucose is the most impoant substrate of hexokinases, and glucose-6-phosphate is the most impoant product. Hexokinase can transfer an inorganic phosphate group from ATP to a substrate. 