What Are the Different Types of Cellular Respiration?

Cellular respiration refers to the process by which organic matter undergoes a series of oxidative decomposition in the cell to produce inorganic or small molecule organic matter, releasing energy and generating ATP. ^[1]

(1) Provide direct energy substance for all life activities of organisms-ATP.

(2) Provide raw materials for the synthesis of other compounds in the body.

(3) Maintain the body temperature of the constant temperature animal.

Application of aerobic breathing principle

(1) Crop cultivation should release soil in a timely manner, use aerobic respiration of the root system to promote the absorption of water and inorganic salts; paddy fields need to be drained regularly, otherwise the anaerobic respiration of the roots will produce a large amount of alcohol and have a toxic effect on the cells, making Root rot. ^[1]

Cellular respiration can be divided into 3 stages.

In the first stage , various energy substances are transformed into

Breathing chain

The picture on the right is the most widespread NADH respiratory chain and another FADH2 respiratory chain. In the figure, MH2 is used to represent any reduced metabolite, such as malic acid. Under the catalysis of a specific nicotinamide dehydrogenase (malate dehydrogenase), a pair of hydrogens can be removed to form the oxidation product M (oxaloacetate). Such dehydrogenases use NAD ⁺ (nicotinamide adenine dinucleotide) or NADP ⁺ (nicotinamide adenine dinucleotide phosphate) as coenzymes. Both coenzymes contain nicotinamide (vitamin PP). In the dehydrogenation reaction, the coenzyme can accept one hydrogen and one electron to become a reduced coenzyme, and the remaining one H ⁺ remains in the liquid medium.

The reaction is as follows:

^[3]