Fermentation - Biology Class 9

Fermentation is an anaerobic process that occurs entirely in the cytoplasm of the cell, as it does not require the mitochondria, which are used for aerobic respiration.

When muscles work harder than the oxygen supply can support, they switch to lactic acid fermentation. The accumulation of lactic acid is associated with the burning sensation felt in muscles during intense exercise.

Fermentation is an inefficient process that only produces a net gain of 2 ATP molecules per glucose molecule, which are generated during the glycolysis stage.

Aerobic respiration is considered 'better' in terms of energy yield because it produces significantly more ATP (36-38) compared to the 2 ATP produced by anaerobic fermentation.

Alcoholic fermentation, performed by yeast and some bacteria, converts glucose into ethanol and carbon dioxide.

The prefix 'an-' means without, and 'aerobic' refers to oxygen. Thus, anaerobic respiration is the process of generating energy without the use of oxygen.

All forms of fermentation and cellular respiration begin with glycolysis, which requires glucose as the primary fuel source to produce energy.

Lactic acid fermentation is named for its primary product, lactic acid, which is produced in animal muscle cells during periods of low oxygen.

The two primary types of fermentation commonly taught in biology are lactic acid fermentation and alcoholic fermentation.