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Name's Crystal, Alicia, Pamela, Tzu Hsuen. We are thirteen tis yr. Studying in Holy Innocent High Sch. SCIENCE rawks!

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Anaerobic Respiration
Written at Friday, September 25, 2009 | back to top


















In biology, anaerobic respiration is a way for an organism to produce usable energy carriers without the involvement of oxygen. It is respiration without oxygen. It produces less energy than aerobic respiration because food is not completely broken down into carbon dioxide and water with the release of all it's stored energy.


Respiration is a chemical reaction that processes energy in a form usable by an organism, chiefly the process of producing ATP(adenosine tri-phosphate), the "universal energy currency of life."It employs an electron transport chain, with inorganic molecules other than oxygen used as a final electron acceptor.

Example:

  • Glucose (Broken down to)→Energy (ATP) + Ethanol + Carbon dioxide (CO2)

  • Glucose (Broken down to) →Energy (ATP) + Lactic acid

The process of anaerobic respiration is relatively less energy yielding as compared to the aerobic respiration process. During the alcoholic fermentation or the anaerobic respiration two molecules of ATP (energy) are produced, every molecule of glucose used in the reaction. Similarly for the lactate fermentation 2 molecules of ATP are produced for every molecule of glucose used. Thus anaerobic respiration breaks down one glucose molecule to obtain two units of the energy storing ATP molecules.

What are the uses of anaerobic respiration?

  • In plants, yeasts, and bacteria, anaerobic respiration results in the production of alcohol and carbon dioxide, a process that is exploited by both the brewing and the baking industries.

  • To survive in some habitats, such as the muddy bottom of a polluted river, an organism must be to a large extent independent of oxygen such habitats are said to be anoxic.

  • During intense physical activity, muscles use anaerobic respiration, which produces lactic acid. Lactic acid buildup is the reason muscles become weak during exertion and sore afterwards.

  • Anaerobic respiration is a less efficient way of cellular energy production, producing only two molecules of ATP to the 40 produced in aerobic respiration.

♥Thoughtz...

Pamela:

Wow! I did not know that organisms produce usable energy carriers without the involvement of oxygen with the process anaerobic respiration. After this research on anaerobic respiration, I had learnt a lot about it. Although it is a little bit complicated but it is also a interesting topic to research on.

Crystal:

I learnt that the uses of anerobic respiration helps us in our daily life. Anaerobic respiration uses less energy than anerobic respiration. But 1 question I not sure is that plants carried out both aerobic and anaerobic respiration at the same time? O.o

Tzu Hsuen:

The above diagram shows me the process of anaerobic respiration but it does not show me very clearly. So I got a little bit blur... I want to ask if the uses in anaerobic respiration is the same as aerobic respiration? =)