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Name: Bhavnisha L.
Status: Student
Age: 17
Location: N/A
Country: N/A
Date: N/A 


Question:
How do bacteria respire aerobically?

Is it the same as human respiration (ie. does it have these stages: glycolysis, kreb cycle, electron transport chain)?



Replies:
No, bacterial respiration is not exactly the same as that of humans. Bacteria do not have mitochondria, the cellular particles of eukaryotes that are specialized in energy production and oxidative respiration. Still, the principle is identical: glucose is oxidated to CO2 in a number of steps, and an electron transport chain is present on their membrane. The Kreb's cycle is for the most part conserved. One hypothesis is that mitochondria are derived from a symbiosis between different bacteria, in which the incoming bacteria specialized in energy matters, and these became the mitochondria. It would explain why mitochondria have their own DNA that in some respects resemble DNA of bacteria. Different species of bacteria have differnt pathways for energy metabolism, and not all use oxidative respiration.

Dr. Trudy Wassenaar


Pretty much...in fact most of what we theorize goes on in human metabolism comes from our studies in e-coli.

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