Which of the following is $NOT$ a disaccharide?

Which of the following structures represents thymine?

Identify the glycosidic linkage present in lactose.

How many products are produced respectively when optically pure glucose and fructose are reduced one by one by $NaBH_4$?

Compound $A$,$C_5H_{10}O_5$,gives a tetraacetate with $Ac_2O$ and oxidation of $A$ with $Br_2-H_2O$ gives an acid,$C_5H_{10}O_6$. Reduction of $A$ with $HI$ gives isopentane. The possible structure of $A$ is:

The term anomers of glucose refers to