is hexose glucose
Hexose Transporters. The hexoses glucose, galactose and fructose serve as important dietary energy sources in animals and glucose plays a central role in energy homeostasis within eucaryotic cells.These molecules are unable to diffuse passively across cellular membranes, and require transporter proteins for entry into and exit from cells.he hexoses glucose, galactose and fructose serve as important dietary energy sources in animals and glucose plays a central role in energy homeostasis within eucaryotic cells.