Question

Trehalose, sophorose and turanose are disaccharides. Trehalose is found in the cocoons of some insects, sophorose turns up in a few bean varieties, and turanose is an ingredient in low-grade honey made by bees with indigestion from a diet of pine tree sap. Identify trehalose, sophorose, and turanose (may be none of the above) among the following structures on the basis of the following information.

a. Turanose and sophorose are reducing sugars. Trehalose is non-reducing.
b. Upon hydrolysis, sophorose and trehalose give two molecules each of aldoses. Turanose gives one molecule of an aldose and one molecule of a ketose.
c. The two aldoses that constitute sophorose are anomers to each other.

Answer 1

First structure is sophorose, second structure is turanose, third structure is trehalose, fourth structure is none of the above.