Which group of vitamins is fat-soluble?

Molecules are always moving. Some molecules move faster than others; . . . . . . is a measure of their average velocity of movement.

Which of the following vitamins is essential for $DNA$ synthesis and cell division?

The energy currency of the cell is ......... .

Select the correct match for $X$ and $Y$.

Column $X$	Column $Y$
$(1)$ Starch	$(P)$ Found in animal skeletal tissues
$(2)$ Glycogen	$(Q)$ Stored food form in plants
$(3)$ Chitin	$(R)$ Provides strength in sclerenchyma
$(4)$ Lignin	$(S)$ Stored food form in animals

Which of the following pairs is $NOT$ correctly matched?