Question

What are the reactants and end products of cellular respiration?

Answer 1

Hint: During respiration, the molecules of glucose (carbohydrates) break down into smaller molecules that produce energy. The reaction occurs in the presence of oxygen molecules to release waste products. The reaction involves the catabolic pathway.

Complete answer:
The mechanism in which cells break down molecules for energy is cellular respiration. To create water and release carbon dioxide, the cells use oxygen to break down food in the form of glucose. Energy is generated in the form of ATP in this reaction, which the cell uses for its various activities.
$\underset{Glucose}{C_6{H}_{12}{O}_6}+\underset{Oxygen}{O_2}⟶\underset{CarbonDioxide}{{CO}_2}+\underset{Water}{H_{2}O}+ATP$
The oxygen you breathe is used by the cells of your body to get energy from the food you consume. Cellular respiration is called this process. The cell utilizes oxygen to break down sugar during cellular respiration. Oxygen is used, carbon dioxide is produced, and energy is released when the cell uses oxygen to break down sugar.
The process of respiration is categorized into two types: cellular respiration, and respiration at the body level. Cellular respiration is of two types: aerobic respiration, which is the process of breaking glucose molecules to produce energy in the presence of oxygen. When the glucose molecule is broken a huge amount of energy is released which results in the formation of carbon dioxide and water as an end product.
The other type is anaerobic respiration, it is the process of breaking glucose molecules partially and producing less energy in comparison to the anaerobic respiration. When the glucose is unable to break completely then this process will occur as the amount of oxygen is less resulting in the formation of lactic acid which is the end product.
Cellular respiration consists of three stages: glycolysis (the process in which the molecule of glucose is converted into pyruvate acid with end products as water and carbon dioxide), oxidative phosphorylation (the process in which ATP is formed through electron transfer and occurs in the mitochondrial matrix), and citric acid cycle (The process where ATP is produced and occurs in the mitochondrial matrix).

Note:
The anaerobic respiration comes first from which the aerobic respiration was evolved. It was found that the suggestion of anaerobic respiration was possibly done by a French microbiologist and chemist Louis Pasteur. In 1895, Beijerinck was the first one to discover and describe the anaerobic respiration.