In the given figure,what does $A$ indicate?

Which one of the following is an antioxidant vitamin?

Complete the following analogy-type questions:
$(i)$ Plant : Starch :: Mammal : .......
$(ii)$ Amino acid : Protein :: Nucleotide : ............

In the liver,glucose is converted into glycogen,which is stored in the ....... .

Which property of water is responsible for maintaining the homogeneity of the cytoplasm?

Match the names of items listed under column $I$ with the items given under column $II$; choose the answer which gives the correct combination of the alphabets of the two columns.

Column $-I$	Column $-II$
$(A)$ Ketone	$(p)$ Has $5$ carbon sugar,a phosphate group and a nitrogenous base
$(B)$ Fatty acid	$(q)$ Has long chain of carbon and hydrogen atoms and a carboxyl group at one end
$(C)$ Aldehyde	$(r)$ Has a carbonyl group at the end of the carbon chain
$(D)$ Nucleotide	$(s)$ Has a carbonyl group within the carbon chain