Class 7 Biology Respiration in Organisms Anaerobic respiration

Anaerobic respiration

  • In this type of respiration the food is broken down into carbon-dioxide and energy in the absence of oxygen. For instance, facultative anaerobes and obligate anaerobes.

  • Facultative anaerobes are the organisms that are capable of respiring both in presence as well as absence of oxygen. For example, Escherichia coli.

  • Obligate anaerobes are the organisms that are capable of respiring only in absence of oxygen. For example, clostridium tetani.

Anaerobic respiration can further be classified into two types:

Lactic acid fermentation and alcohol fermentation.

  • Lactic acid fermentation refers to the metabolic process in which glucose are converted into cellular energy and the metabolite lactate.
  • Alcoholic fermentation refers to the biological process in which glucose and other sugars such as fructose, and sucrose are converted into cellular energy, producing ethanol and carbon dioxide.

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