Which sugar is found in fruit juices?

$A$ molecule of disaccharide is formed by the formation of a glycosidic bond between which two sugars?

Carbohydrates are commonly stored as starch in plant storage organs. Which of the following five properties $(A-E)$ make starch useful as a storage material?
$(a)$ Easily translocated
$(b)$ Chemically non-reactive
$(c)$ Easily digested by animals
$(d)$ Osmotically inactive
$(e)$ Synthesized during photosynthesis
Useful properties:

Lactose is composed of ...... .

In aldotriose and ketotriose,which carbon atoms are attached to the aldehyde $(-CHO)$ and ketone $(>C=O)$ groups,respectively?

Which type of sugars provide energy to the body?