EVERYDAY SCIENCE

Detailed explanation-1: -Fermentation usually happens in yeast cells and bacteria. Also, the animal muscle cells show lactic acid fermentation in case of inadequate oxygen supply. In yeast, there is incomplete oxidation of glucose that happens in an anaerobic environment. Here, pyruvic acid is converted into carbon dioxide and ethanol.

Detailed explanation-2: -Lactic acid fermentation is carried out by certain bacteria, including the bacteria in yogurt. It is also carried out by your muscle cells when you work them hard and fast. This is how the muscles of the sprinter in Figure 5.10.

Detailed explanation-3: -Muscle cells also carry out lactic acid fermentation, though only when they have too little oxygen for aerobic respiration to continue-for instance, when you’ve been exercising very hard.

Detailed explanation-4: -Answer and Explanation: Lactic acid fermentation is an anaerobic reaction that takes place in the cytoplasm of cells.