Question

Which of the following is not a product of fermentation?
A. CO₂
B. O₂
C. Ethanol
D. Lactate

Answer 1

Hint:
Now we are here to discuss the topic of Fermentation.
In order to produce substances that can be used to create chemical energy, sugar molecules should be broken down into simpler compounds during fermentation. Chemical energy is important because it powers numerous biological activities. It normally takes the form of ATP. Being "anaerobic" means that fermentation does not involve the utilization of oxygen.

Complete step by step answer:
In order to ferment food, living beings also use aerobic and anaerobic respiration to break down sugar molecules like glucose to produce chemical energy. The term "aerobic" relates to respiration which involves the utilization of oxygen. There seem to be three main steps. A 6-carbon sugar molecule is first broken down into two three-carbon pyruvate molecules during glycolysis. The cycle of citric acid then breaks down each pyruvate into CO2 by converting it to acetyl coenzyme A.
Prokaryotes and eukaryotes, including humans, can ferment. When our body requires a lot of energy and its oxygen supply is limited, fermentation takes place. When we participate in a demanding exercise, for example, this occurs. In order to provide energy, the muscle cells produce ATP through aerobic respiration. However, when the blood supply of oxygen cannot keep up with the demand for ATP, the muscle cells turn to lactic acid fermentation to continue producing energy even while the blood supply of oxygen is constrained. They resume aerobic respiration when the oxygen level stabilizes.
Therefore, O₂ is not the product of fermentation.

Option ‘B’ is correct

Note:
Fermentation is an anaerobic process carried out by a cell to produce chemical energy (such as ATP) from pyruvate (a byproduct of glycolysis), however without passing through the citric acid cycle and the electron transport chain system as does cellular respiration.