Question

The enzyme purified and crystallised for the first time was

• A. Urease
• B. Insulin
• C. Diastase
• D. Zymase

Answer 1

The correct option is A Urease

Enzymes are the proteins which catalyze a biochemical interaction. It was crystallized by Sumner. They were found in yeast extract by Buchner in 1897. He prepared a yeast extract and added sugar solution to it. After some time he noticed the alcohol formation in the extract which was a sign of fermentation which took in presence of enzyme. Later on, Sumner crystallized an enzyme known as urease and reported that all enzymes are protein. Urease catalyzes the hydrolysis of urea into carbon dioxide and ammonia.

So, the correct answer is option A.