The body metabolizes fructose a little differently than glucose. The liver (and muscles) can’t store fructose like they can glucose; the liver has to do something with it. One pathway is to metabolize it to glucose, which the body then handles like any other source of glucose -- mostly storage -- and the other main pathway is conversion to fat. Any mention of the conversion of carbohydrates to fat seems to invoke terror in many dieters. (What about direct consumption of fat?) In any case, the much feared high-fructose corn syrup (HFCS) and other sources of fructose have come under increasing scrutiny.
What is true, though, is that glucose can also be converted to fat if you eat in excess of dietary requirements. In addition to naturally occurring free glucose in fruits, glucose is also a metabolic product of the consumption of starches like grains and potatoes.