Prokaryotes are unicellular organisms that lack a nucleus and other membrane-bound organelles. They carry out all their metabolic processes within the cytoplasm. One of the essential metabolic processes in prokaryotes is respiration, which involves the breakdown of glucose to produce ATP.


Mesosomes are membrane invaginations in prokaryotic cells. They are believed to be involved in respiration and DNA replication. The mesosome provides a large surface area for the attachment of respiratory enzymes, which increases the rate of respiration. The respiratory enzymes are embedded in the mesosome membrane, which is continuous with the plasma membrane. Therefore, the mesosome is an important site for respiration in prokaryotes.


The cell wall is another important structure in prokaryotic cells. It provides support and protection to the cell. Some prokaryotic cells have a thick cell wall, while others have a thin cell wall. The cell wall is composed of peptidoglycan, which is a complex polymer of sugars and amino acids.

Although the cell wall is not directly involved in respiration, it plays an important role in regulating the exchange of gases between the cell and the environment. The cell wall is permeable to small molecules, such as oxygen and carbon dioxide. Therefore, the cell wall allows the diffusion of these molecules into and out of the cell, which is necessary for respiration to occur.


In conclusion, respiration in prokaryotes occurs primarily in the mesosome, which provides a large surface area for the attachment of respiratory enzymes. However, the cell wall also plays an important role in regulating the exchange of gases between the cell and the environment, which is necessary for respiration to occur.

Cellular respiration occurs in mesosome bcoz absence of mitochondria