Which is a Similarity Between Alcohol Fermentation and Aerobic Respiration

An important biochemistry topic is ‘respiration,’ through which your body converts nutrients into adenosine triphosphate (ATP) molecules to obtain energy. The two different types of respiration are aerobic respiration and fermentation. Some other type of respiration is anaerobic respiration which is a trivial similar to fermentation but nevertheless quite different.

Aerobic Respiration vs Fermentation

The main difference betwixt aerobic respiration and fermentation is that aerobic respiration takes place in the presence of oxygen as it is required for the breakdown process of its respiratory material, where fermentation does not crave the presence of oxygen to break down its respiratory materials. Both of these are used to obtain energy, simply their processes are different.

Aerobic respiration takes identify in the presence of oxygen, generates adenosine triphosphate (ATP) molecules which are used as energy for various bodily functions. It goes through three stages in total. These are the glycolysis, Krebs cycle, and further going through oxidative phosphorylation. It is a grade of cellular respiration.

On the other paw, during the process of fermentation, saccharide molecules are broken downwardly into simpler compounds to produce ATP molecules to carry biological processes. Information technology happens in the absence of oxygen. It has 2 steps, namely glycolysis and NADH regeneration which is a process of breaking downward pyruvic acid.

Comparison Table Between Aerobic Respiration and Fermentation

Parameters of Comparison Aerobic Respiration Fermentation
Organisms Animals and plants Yeast and bacteria mainly
Oxygen Oxygen is used to interruption down the respiratory material. Oxygen is not used.
End Products Carbon dioxide and water. Ethyl alcohol and carbon dioxide
Respiratory Material. Completely oxidized Not completely broken.
Formation of H2o Information technology is formed. It is usually non formed.
Continuation It occurs indefinitely. It tin can’t occur indefinitely.
Free energy Formed 686 Kcal 39-59 Kcal
ATP molecules 36 ATP molecules are produced. 2 ATP molecules are produced.
Steps It has three steps. Information technology has two steps.

What is Aerobic Respiration?

Aerobic respiration uses oxygen to produce free energy in the form of ATP molecules by breaking down respiratory material. It is most common in complex organisms like animals, humans, plants, mammals, etc. It is a type of cellular respiration.

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The master end-products formed are carbon dioxide and h2o. It takes place in the cell’due south mitochondrial matrix. It is very important as it provides plenty energy to organisms to perform the essential functions and processes of similar.

At that place are different stages of aerobic respiration. The kickoff stage is glycolysis occurring in the cell’s cytosol. During glycolysis, glucose is divided into 2 ATP and 2 NADH molecules. Then acetyl coenzyme A is formed.

In the next step, the Krebs cycle (too known every bit the citric acid cycle) occurs. During the last phase of aerobic respiration, large quantities of ATP molecules are formed through the transfer of electrons from FADH and NADH. In the end, effectually 36 ATP molecules are formed through it.

The ATP molecules are produced from ADP and inorganic phosphate with the usage of ATP synthase.

What is Fermentation?

Fermentation is an anaerobic process of breaking down glucose to obtain ATP molecules, which means it can occur in the absence of oxygen. It occurs in different types of micro-organisms most of the fourth dimension, similar eukaryotes and prokaryotes. It most commonly occurs in yeast and bacteria. It tin can also occur in humans merely merely if the oxygen supply is very limited and at that place is high demand for energy, for example, during intense workouts.

In humans, fermentation takes place in muscle cells when there is a lack of oxygen. These cells can use up their oxygen if they contract very often. In the absenteeism of oxygen, they go through glycolysis to produce ATP molecules. These muscle cells make pyruvic acid through glucose, after which an enzyme present in musculus cells converts information technology into pyruvic acid.

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In fermentation, glucose is metabolized (i.e., cleaved downward into) pyruvic acrid through the process of glycolysis. This pyruvic acrid is converted into acetaldehyde. Then information technology is further converted into ethyl alcohol. two ATP molecules are produced on average through the process of fermentation.

Main Differences Between Aerobic Respiration and Fermentation

  1. Aerobic respiration tends to take place in animals and plants that means in organisms that are multicellular and circuitous. On the other hand, fermentation occurs in micro-organisms similar yeast and leaner mainly.
  2. Aerobic respiration happens with the help of oxygen which is then used to break the respiratory material down into simpler substances. Fermentation does non use oxygen in the breakdown of its respiratory textile.
  3. The process of aerobic respiration produces carbon dioxide and h2o as a last product, whereas the end products of fermentation consist of at least one organic substance, and inorganic substances may or may non be produced. Ethyl alcohol and carbon dioxide are the most common end products hither.
  4. The respiratory material is completely oxidized in aerobic respiration, where it is incompletely broken during the fermentation process.
  5. During aerobic respiration, water is formed, whereas, during fermentation, water isn’t formed.
  6. Aerobic respiration tin go on indefinitely, whereas fermentation can’t go on indefinitely since information technology can atomic number 82 to less availability of free energy and an accumulation of poisonous compounds.

  7. Through aerobic respiration, 686 Kcal of energy per gram mole of glucose are produced, wherein fermentation the free energy produced is around 39 to 59 Kcal.
  8. Around 36 ATP molecules are produced during aerobic respiration. On the other hand, just 2 ATP molecules are produced during fermentation.
  9. Aerobic respiration has three steps, which are Krebs’ cycle, glycolysis, and oxidative phosphorylation. Fermentation has only ii steps, which are glycolysis and an incomplete breakup of pyruvic acid.
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Aerobic respiration and fermentation are both used to provide energy to organisms in dissimilar ways. Aerobic respiration occurs mainly in animals and plants and under the presence of oxygen, whereas fermentation occurs mainly is yeast and bacteria and in the absence of oxygen.

Both of these processes are equally important every bit both take slightly different functions and stages that they get through.


  1. https://onlinelibrary.wiley.com/doi/abs/10.1002/jctb.5030320607
  2. https://www.annualreviews.org/doi/abs/10.1146/annurev-nutrient-022811-101255

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Which is a Similarity Between Alcohol Fermentation and Aerobic Respiration

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