Vitamin $C$ is

What is the main similarity between hormones and enzymes?

Which of the following is a water-soluble vitamin?

Vitamins are:

Identify and list $10$ interesting small molecular weight biomolecules. Determine if there are industries that manufacture these compounds through isolation and identify their primary buyers.

Match the items in Column-$I$ with Column-$II$ and select the correct option.

Column-$I$	Column-$II$
$(A)$ Aspartic acid	$(i)$ Two $\alpha$-chains and two $\beta$-chains
$(B)$ Haemoglobin	$(ii)$ $FMN$
$(C)$ Cytoplasm	$(iii)$ Nitrogen fixation
$(D)$ Azotobacter	$(iv)$ Site of protein synthesis
	$(v)$ Polar and negatively charged amino acid