Question

Who coined the term zymase for enzymes in yeast?
A. Kuhne
B. Sumner
C. Louis Pasteur
D. Eduard Buchner

Answer 1

Hint: Zymase can be described as the mixture of enzymes that are obtained from yeast which can catalyze the breakdown of sugars in the alcoholic fermentation.

Complete answer: Eduard Buchner was the first person who coined the term zymase for the complex of biocatalysts extracted from yeast and taking part in alcoholic fermentation.
In 1903, he isolated the first enzyme - zymase.
He was attributed to the actual discovery of enzymes. He was awarded a Nobel prize for this work in his later life. Enzymes are proteins that can accelerate the rate of the chemical reaction. In 1978, Scientist Wilhelm Kuhne coined the term enzyme. The meaning of the word enzyme is in leaven. The word enzyme referred to describe non-living substances such as pepsin, trypsin, etc.

So, the correct answer is option D. Eduard Buchner.

Note: 1. American chemist James Batcheller Sumner discovered the crystalline form of enzymes. He has later received the Nobel Prize in Chemistry in 1946 for his research work. 2. With him, Scientist John Howard Northrop and Wendell Meredith Stanley also received Nobel prize jointly. He was the first scientist to prove that the enzymes are proteins.
3. Louis Pasteur was a famous French biologist, microbiologist, and chemist.
He was famous for his discoveries such as – the principles and techniques of vaccination, the microbial technique of fermentation, and the mechanism of pasteurization.