On complete hydrolysis of starch,we finally get

Given below are two statements :
Statement $I :$ $D$-glucose pentaacetate does not react with $2,4$-dinitrophenylhydrazine.
Statement $II :$ Starch,on heating with dilute sulfuric acid at $393 \ K$ and $2-3 \ \text{atmosphere}$ pressure,produces glucose.
In the light of the above statements,choose the correct answer from the options given below.

Which of the following reactions indicates the linear structure of glucose?

The structures of cyclic $D$-glucoside are given. Determine the moles of $HIO_4$ consumed by $X$ and $Y$ respectively.

$\alpha-D-(+)-$Glucose and $\beta-D-(+)-$Glucose are not

What are glycosidic linkages? In which type of biomolecules are they present?