Question

Ethyl alcohol is the end product of ……….. respiration.

Answer 1

Hint: Alcohol (ethyl alcohol) is the by-product that occurs during the glycolysis process in the absence of oxygen and presence of yeast. It is one type of cellular respiration which is also called a fermentation process.

Complete answer:
As cellular respiration is of two types one is aerobic respiration and other is anaerobic respiration.
Aerobic respiration : Aerobic respiration is a set of metabolic reactions that take place in the presence of oxygen that converts chemical energy into ATPs. Most eukaryotes and prokaryotes use aerobic respiration to obtain energy from glucose. Examples –humans ,dogs, cats and all animals and birds etc...
Anaerobic respiration: glucose breaks down in the absence of oxygen. Anaerobic respiration also known as fermentation. The chemical reaction transfers energy from glucose to the cell. Anaerobic respiration doesn't produce as much energy as aerobic respiration. It mainly takes place in freshwater soil and deep sea surfaces and in muscle cells during immediate contraction and relaxation. Many bacteria use anaerobic respiration. Within the human body, both aerobic and anaerobic respiration are important to muscle functions. Glycolysis is both an aerobic and anaerobic process. Advantage of anaerobic process is its speed. It produces ATP very quickly. Energy + glucose$\xrightarrow{{yeast}}$ ethanol + carbon dioxide + energy

Additional information :
There are two main types of anaerobic respiration, one is alcoholic fermentation and other is lactic acid fermentation.

Note: Anaerobic respiration converts sugars into alcohol, gases ,acids and some energy. In plants, the glucose in the absence of oxygen ( anaerobically ) converted to ethyl alcohol, ATP and carbon dioxide. In humans anaerobic respiration occurs in RBCs.