Respiration is a series of chemical reactions, but this equation summarises the overall process. Aerobic respiration breaks down glucose and combines the broken down products with oxygen, making water and carbon dioxide. The carbon dioxide is a waste product of aerobic respiration because cells do not need it. The first stages of respiration occur in the cytoplasm of plant and animal cells, but most of the stages of respiration that release energy happen in the mitochondria. Microorganisms do not have mitochondria - they carry out respiration only in the cytoplasm.
Most organisms cannot respire without oxygen but some organisms and tissues can continue to respire if the oxygen runs out.
In conditions of low or no oxygen the process of anaerobic respiration occurs. The 'an' in 'anaerobic' means without. During anaerobic respiration, the oxidation of glucose is incomplete - not all of the energy can be released from the glucose molecule as it is only partially broken down. The reaction therefore releases much less energy than aerobic respiration - around only a nineteenth of the energy released during aerobic respiration.
This means that fewer molecules of ATP can be made. Glucose in human muscle cells is converted to lactic acid during anaerobic respiration:. You must Sign In to post a response.
Category: Science. Why is water not produced through an-aerobic respiration It is one of the basic differences between aerobic and anaerobic respiration that aerobic respiration produces water and the other does not. Why exactly does it happen?
Is it because anaerobic respiration gets no or very low oxygen supply or there are other reasons? I am a little confused on this Points: 3. Hello, Aerobic respiration is that respiration in which oxygen is used to complete the process.
But in case of anaerobic respiration the oxygen is need for the completion of the process. Now since the oxygen molecule is present in aerobic respiration the so water is formed by combining with the hydrogen. On the other hand the anaerobic respiration not oxygen is involved, so water is formed.
The reaction of this process is available in text books. Read it and you will get to know more about it. Anaerobic respiration happens in prokaryotes and sometimes is used in sewage treatment plant. This respiration is limited to lower stage cell only because initially earth was not having oxygen.
Humans consume foods that contain sugars and carbohydrates, which the body then turns into glucose. Plants produce glucose during the process of photosynthesis. Cells take glucose and combine it with oxygen to create four molecules of adenosine triphosphate, commonly referred to as ATP, and six molecules of carbon dioxide during glycolysis.
ATP is the molecule that cells need to store and transfer energy. Additionally, two molecules of water are created during this step, but they are a byproduct of the reaction and not used in the next steps of cellular respiration. It is not until later in the process that more ATP and water are created. The second step of cellular respiration is called the Krebs Cycle, which is also known as the citric acid cycle or the tricarboxylic acid TCA cycle.
The electron transport chain is the third and final step of cellular respiration. It is the grand finale in which water is formed, along with the majority of ATP needed to power cellular life. Toward the end of the electron transport chain, the hydrogen from the coenzymes meets the oxygen that the cell has consumed and reacts with it to form water.
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