The common immediate source of energy in cellular activity or the energy currency of the cell is:

Which of the following is $NOT$ a group of organic compounds?

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

Deficiency of tocopherol in the human body causes which condition?

Which property of water allows it to absorb or lose heat from the surrounding environment without undergoing a significant change in its temperature?

Deficiency of $Vitamin \ E$ causes ...... .