Anaerobic respiration is the term given to a process that occurs without the presence of oxygen. In other words, this type of respiration is carried out in the absence of O2
This is also commonly known as fermentation. Some examples are alcohol fermentation or fermentation by yeast or bacteria breaking down organic compounds and releasing energy while they do so (this reaction releases carbon dioxide gas and water).
This is why most beer and wines are made with added yeast so that the process of fermentation is started. This fermentation is normally carried out in the absence of oxygen. The one way to stop this process is by adding sulfites or metabisulfites to wine and beer, which will then kill the yeast, i.e., inhibiting the process of fermentation.
The answer is discussed about which of these equations describes aerobic cellular respiration?
Another type of respiration that occurs without O2 is anaerobic cellular respiration. This process can occur in a number of ways, with one of these methods being glycolysis (glucose breakdown). The main characteristic with each of these processes is that they occur only in the absence of oxygen.
Here some points are discussed about Aerobic Cellular Respiration–
1. Aerobic Cellular Respiration occurs in the presence of oxygen.
This is contrary to anaerobic respiration, which occurs without it. Aerobic respiration basically releases 30 times more energy than anaerobic cellular respiration because of the presence of oxygen.
Normally, glycolysis generates 2 ATP molecules, but aerobic respiration creates 32 ATP molecules from glycolysis alone. The most basic step involved in aerobic cellular respiration is glycolysis, which involves breaking down glucose into two molecules of pyruvate.
2. Glycolysis is the starting point of aerobic cellular respiration.
The first step in the process of aerobic cellular respiration is glycolysis, which occurs in the cytoplasm of a cell and is responsible for generating energy.
Chemicals are broken down to release energy, producing ATP molecules in the process. During glycolysis, glucose is broken down into two smaller molecules: pyruvate. This happens in 3 steps and produces 4 ATP (2 per step).
After glycolysis, there are 3 more steps in aerobic cellular respiration. The energy released during these steps is used to form ATP molecules and is used to power the chemical processes in the cell. Also, the energy released during these steps is used for supplying fuel for ATP-requiring processes like biosynthesis and body maintenance (metabolic processes).
3. Aerobic cellular respiration is a chemical process.
The process of aerobic cellular respiration is a chemical one and is only possible in the presence of oxygen. The energy released during this process comes from splitting molecules, which includes carbon dioxide and water.
Biosynthesis : The energy released during aerobic cellular respiration is used to supply the energy needed for biosynthesis. This process involves the production of carbohydrates, proteins, lipids, and nucleic acids in cells and results in formation of ATP molecules. Biosynthesis also involves breaking down compounds in other ways. For example, carbohydrates are broken down through glycolysis while proteins are broken down into amino acids through proteolysis (breakdown).
4. Aerobic respiration can be used as an energy source.
This is true in the presence of oxygen. Biosynthesis, which takes place during aerobic cellular respiration, is a very significant process in the production of ATP. While this process requires energy, the amount of energy produced by this process is 30 times more than that produced by anaerobic cellular respiration because of the presence of oxygen.
Therefore, aerobic cellular respiration is a very significant process in overall cell metabolism. This is one of the reasons why we have evolved with it being our primary method of surviving.
5. Aerobic Cellular Respiration uses Pyruvate as a starting point.
Aerobic respiration occurs in the presence of oxygen and uses pyruvate as a starting point. In aerobic respiration, both glycolysis and the Krebs cycle are used to generate ATP. During glycolysis, pyruvate is broken down into two molecules of carbon dioxide and water.
The pyruvate molecule then enters the Krebs cycle, where it is broken down into carbon dioxide and more glycolysis occurs. This continues until all of the energy released during aerobic cellular respiration is gone.
6. Aerobic Cellular Respiration is the final stage of cellular respiration.
This process takes place in the presence of oxygen, but can’t occur in the absence of glycolysis, which is an anaerobic process. Aerobic cellular respiration occurs only in the presence of oxygen as described above, but it’s also true that this type of respiration doesn’t have any significant role to play, if there is no glycolysis taking place first.
Glycolysis is a very significant starting point because it releases energy from glucose. The difference between aerobic and anaerobic respiration lies in the fact that aerobic cellular respiration releases energy from sugar through oxidation