Question

............ is the first protein molecule whose structure was discovered and deciphered.

• A. Insulin
• B. Glucagon
• C. Histone
• D. Urease

Answer 1

The correct option is A Insulin

Insulin is a protein hormone secreted by the pancreas. It maintains blood glucose level as an antagonist of glucagon. In the year 1953, Frederick Sanger worked out the sequence of amino acids in the polypeptide chain of the hormone insulin. Thus, insulin became the first protein molecule to be sequenced.

So, the correct answer is option A.