Subunits present in haemoglobin are

Coagulation of egg white on boiling is an example of denaturation of protein. Explain it in terms of structural changes.

Which of the following statements is not correct?

Which of the following statements are correct? A) $\alpha - \text{amino acids present in protein is L- amino acid.}$ B) $\text{Amino acids contain } NH_2 \text{ as well as COOH group.}$ C) $\text{Number of amino group and carboxylic group are same in amino acids always.}$ D) $\text{Tryosine was firstly obtained from cheese.}$ Choose the correct alternatives from below:

Nitrogen is an essential constituent of all

Peptide linkage is: