a) A newly discovered microorganism has been classified as a chemolithotrophic a

Question

a) A newly discovered microorganism has been classified as a chemolithotrophic autotroph.

   i)Dissect this term to explain what this means about the microorganism’s metabolism.

    ii)In what sort of environment where would you expect to find this microorganism?

b) Explain how the bacterial electron transport chains differ from eukaryotic electron transport chain.

c) Imagine a microbial cell that normally carries out aerobic respiration has encountered a low oxygen environment and may die if the levels do not increase.

    i) Describe the key role that oxygen plays for this microorganism in the aerobic respiration process and what will occur differently without oxygen that could lead to    death.

    ii) How would you class this organism in terms of oxygen for growth requirements?

Explanation / Answer

A.i.They are the certain groups of prokaryotes that obtain their energy from the oxidation of reduced inorganic compounds such as sulfide, ammonia and hydrogen, and use carbon dioxide as carbon source are called chemolithotrophs or chemoautotrophs.

¡¡.ChemoLithotrophs may be present in a variety of environments, including deep terrestrial sub surfaces, soils, mines, and in endolith communities.

B. Dofference lies in the fact that In eukaryotes, an important electron transport chain is found in the inner mitochondrial membrane where it serves as the site of oxidative phosphorylation through the action of ATP synthase while in bacteria, the electron transport chain is located in their cell membrane.

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