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L14 : Respiration types: Anaerobic - Life Processes, Science, Class 10 Video Lecture

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1. What is anaerobic respiration?
Anaerobic respiration is a type of respiration that occurs in the absence of oxygen. It is the process by which cells produce energy from glucose without using oxygen. Instead of oxygen, other molecules such as nitrate, sulfate, or even pyruvate are used as final electron acceptors in the electron transport chain.
2. What are the two types of anaerobic respiration?
The two types of anaerobic respiration are alcoholic fermentation and lactic acid fermentation. Alcoholic fermentation is carried out by some bacteria and yeast, where glucose is converted into ethyl alcohol and carbon dioxide. Lactic acid fermentation, on the other hand, occurs in muscle cells when there is a lack of oxygen, converting glucose into lactic acid.
3. How is anaerobic respiration different from aerobic respiration?
Anaerobic respiration differs from aerobic respiration in several ways. Firstly, anaerobic respiration does not require oxygen, while aerobic respiration does. Secondly, anaerobic respiration produces less energy (ATP) compared to aerobic respiration. Lastly, anaerobic respiration produces byproducts such as lactic acid or ethyl alcohol, while aerobic respiration produces carbon dioxide and water as byproducts.
4. What organisms carry out anaerobic respiration?
Various organisms can carry out anaerobic respiration. Some bacteria, such as those found in the gut, can perform anaerobic respiration. Yeast is another example of an organism that carries out anaerobic respiration during alcoholic fermentation. Additionally, certain muscle cells in animals can switch to anaerobic respiration when there is a lack of oxygen.
5. What are the advantages and disadvantages of anaerobic respiration?
One advantage of anaerobic respiration is its ability to provide energy in the absence of oxygen, allowing organisms to survive in environments with low oxygen levels. It is also a quicker process compared to aerobic respiration. However, anaerobic respiration produces less energy (ATP) and can lead to the accumulation of lactic acid or ethanol, which can be toxic to cells.
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