Question

How do the products of fermentation in animals differ from yeast?

Answer 1

Hint: The chemical process by which molecules such as glucose are broken down to produce energy in absence of oxygen is called Fermentation. Fermentation occurs in yeast, bacteria, plant cells and muscle cells of animals.

Complete answer:
Fermentation in animals:
Fermentation in animals is referred to as Anaerobic Respiration.In this process, NADH (Nicotinamide adenine dinucleotide (NAD) + Hydrogen (H)) transfers its electron to pyruvate, which is a very important chemical compound resulting from the metabolism of glucose, resulting in Lactate and 2 ATPs (Adenosine triphosphate, an energy carrying molecule) being derived as a secondary product in the chemical reaction. And since the bi-product of this process is the deprotonated form of Lactic Acid, this process is also called Lactic Acid Fermentation.

Fermentation in Yeast:
In this process, NADH transfers its electrons to a derivative of pyruvate, resulting in the production of ethanol, an organic chemical compound with the chemical formula C ₂H ₆O. This happens in 2 steps-
At First, a carboxyl group is detached from pyruvate, producing carbon dioxide as a bi-product. After that,NADH allocates its electrons to acetaldehyde, forming ethanol.
Yeast + sugar
Carbon dioxide + ethanol

Note: Animals produce lactic acid and ATP as bi-products of fermentation, whereas yeasts produce ethanol and carbon dioxide in fermentation. It should also be noted that Lactobacillus, the bacteria that make yogurt also carry out lactic acid fermentation, as do the erythrocytes,since they don’t have mitochondria and thus can’t perform cellular respiration.