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Name: Adriane
Status: student 
Grade: 9-12 
Location: IL 
Country: USA 
Date: N/A 


Question:
How do bacteria cells process energy without a mitochondria?



Replies:
They are essentially a cell which is the size of a mitochondria.

Ron Baker, Ph.D.


Adriane,

Bacteria have similar metabolic reactions and processes that convert biochemical energy from nutrients into ATP, or energy. Cellular respiration, which takes place in the mitochondria, are catabolic reactions that involve the oxidation of one molecule and the reduction of another. In the case of animal and plant cells, the nutrients in cellular respiration include glucose, amino acids and fatty acids, and the oxidizing agent (electron acceptor) is molecular oxygen (O2).

Bacteria and archae can also be lithotrophs which have the ability to respire using inorganic molecules. These prokaryotic organisms, or microbes, use inorganic molecules such as sulfur, metal ions, methane or hydrogen - as electron donors and acceptors. Organisms that use oxygen as a final electron acceptor produce ATP by aerobic respiration, while those that do not are referred to as anaerobic.

Hope that helps.

-Alex Viray



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