Which of the following amino acids will give a violet-coloured complex with neutral ferric chloride solution?

Determine the configuration of the given compound.

Which one of the following proteins transports oxygen in the blood stream?

The general structure of $\alpha$-amino acid can be represented as shown below. Which amino acid is not correctly matched with the $R$ group given?

Which of the following is a protein?

Denaturation of proteins leads to loss of its biological activity by