Which protein is present in the largest amount in the human body?

Haemoglobin molecule is made up of

The two polypeptide chains of insulin are linked together by which type of bond?

In protein synthesis,the first amino acid is known as $.....P.....$ and the last amino acid is known as $.....Q.....$.

No cell could live without

Attempt titrating an amino acid against a weak base and discover the number of dissociating (ionizable) functional groups in the amino acid.