What are carbohydrates called that cannot be hydrolyzed into simpler compounds?

At which carbon atom do $\alpha-$ and $\beta-$ glucose differ in the configuration of the $-OH$ group?

Identify the number of structures from the following which can be correlated to $D$-glyceraldehyde.

Considering the facts that
$I$. sucrose forms glycosidic linkage between $C_1$ of glucose and $C_2$ of fructose,while
$II$. lactose forms glycosidic linkage between $C_1$ of galactose and $C_4$ of glucose.
Choose the correct statement.

What type of glycosidic linkages are developed when excess glucose is to be stored for future use in animals?

Starch is a polymer of