wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Conversion of pyruvic acid into ethyl alcohol is mediated by

A
Phosphatase.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
B
Dehydrogenase.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
C
Decarboxylase and dehydrogenase.
Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses
D
Catalase.
No worries! We‘ve got your back. Try BYJU‘S free classes today!
Open in App
Solution

The correct option is D Decarboxylase and dehydrogenase.
Fermentation is a metabolic process that converts sugar to acids, gases, or alcohol and is carried out by a wide range of organisms. Yeast and other microorganisms ferment glucose to ethanol and CO2, rather than to lactate as in muscles of higher vertebrates. Glucose is converted to pyruvate by glycolysis, and the pyruvate is converted to ethanol and CO2 in a two-step process:
In the first step, pyruvate is decarboxylated in an irreversible reaction catalyzed by pyruvate decarboxylase. Pyruvate decarboxylase requires Mg2+ and has a tightly bound coenzyme, thiamine pyrophosphate.
In the second step, acetaldehyde is reduced to ethanol through the action of alcohol dehydrogenase, with the reducing power furnished by NADH derived from the dehydrogenation of glyceraldehyde 3-phosphate.
Ethanol and CO2 are thus the end products of ethanol fermentation, and the overall equation is as follows:
Glucose + 2ADP + 2Pi ----> 2 ethanol + 2 CO2 + 2 ATP + 2 H2O

flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Anaerobic Respiration
BIOLOGY
Watch in App
Join BYJU'S Learning Program
CrossIcon