A reducing sugar<span> is any </span>sugar<span> that is capable of acting as a </span>reducing<span> agent because it has a free aldehyde group or a free ketone group. ... Ketoses must first tautomerize to aldoses before they can act as </span>reducing sugars. The common dietarymonosaccharides<span> galactose, </span>glucose<span> and fructose are all </span>reducing sugars<span>.</span>
parasitism, relationship between two species of plants or animals in which one benefits at the expense of the other, sometimes without killing the host organism.
