AP BIOLOGY

Detailed explanation-1: -The respiration which takes place in the absence of oxygen is known as anaerobic respiration . The microorganisms like yeast break down glucose (food) into ethanol, carbon dioxide and releases energy.It is a type of cellular respiration that takes place in the absence of oxygen to produce energy.

Detailed explanation-2: -Fermentation is a kind of anaerobic respiration. So yeast does indeed undergo anaerobic respiration. During fermentation, yeast produces alcohol and carbon dioxide. The other kind of anaerobic respiration is called lactic acid fermentation which occurs in our muscle cells and produces lactic acid.

Detailed explanation-3: -When oxygen is not present, pyruvate will undergo a process called fermentation. In the process of fermentation the NADH + H+ from glycolysis will be recycled back to NAD+ so that glycolysis can continue. In the process of glycolysis, NAD+ is reduced to form NADH + H+.

Detailed explanation-4: -Yeast is a microscopic organism that respires anaerobically. These respire in absence of oxygen and produce Ethyl alcohol and carbon dioxide. Due to the formation of alcohol they are also known as brewer’s yeast.

Detailed explanation-5: -Alcoholic Fermentation Yeast (a microscopic fungus) are also capable of both cellular respiration and fermentation. When yeast cells are kept in an anaerobic environment (i.e., without oxygen), they switch to alcoholic fermentation to generate usable energy from food.