Unicellular Organism Survival on Single Substance

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Discussion Overview

The discussion centers on the survival mechanisms of unicellular organisms, particularly their ability to utilize single types of substances, such as simple fats, for energy. It explores the conditions under which these organisms can enter dormant states and the requirements for energy sources, including the role of specific molecules in energy production.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested
  • Mathematical reasoning

Main Points Raised

  • One participant questions whether a simple unicellular organism can survive solely on a single type of substance, such as a simple fat, for energy.
  • Another participant suggests that bacteria can utilize very simple molecules as energy sources and mentions a specific bacterium that consumes nitrate.
  • A participant inquires about the requirements for a substance to be used as energy by living organisms, specifically asking if oxygen atoms are necessary.
  • One participant corrects the previous claim about nitrate, explaining that while it can act as an electron acceptor, it does not generate energy on its own and requires an electron donor like acetate.
  • A participant expresses confusion about the process of energy creation within cells and asks for clarification on how organelles utilize energy from the breakdown of organic molecules.

Areas of Agreement / Disagreement

The discussion contains multiple competing views regarding the energy sources for unicellular organisms and the conditions for dormancy. Participants do not reach a consensus on the specifics of energy production and the requirements for substances used by these organisms.

Contextual Notes

There are limitations in the discussion regarding the assumptions made about energy sources and the definitions of terms like "energy" and "electron donor." The exploration of these concepts remains unresolved.

Who May Find This Useful

This discussion may be of interest to those studying microbiology, biochemistry, or cellular biology, particularly in relation to energy metabolism and survival strategies of unicellular organisms.

cam875
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can an extremely simple unicellular organism survive off of one type of substance such as an extremely simple fat, and just break it down to use its energy. What would be the simplest type of fat or form of energy? Also if a simple unicellular organism doesn't want to do anything can it just stop all functions and when activiated by something just begin functioning again sort of like dying until a sensor goes off. Is that possible in an extremely basic organism?
 
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You can think of bacteria as chemical factories. Many of them can use REALLY simple molecules as an energy source. The molecule does not have to organic either. Here is a Montana State news bulletin about an interesting find, a bacterium that eats nitrate and lives in salt water:

http://www.montana.edu/cpa/news/nwview.php?article=4144

Yes, some species of bacteria go into a resting phase - they are called spores. The spore "opens" when conditions are favorable to growth. Clostridium tetanii, the bacterium that causes tetanus, does this. It remains dormant in the soil for very long periods of time.
 
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so what is the requirement for something to be used as energy for a living organism? having oxygen atoms in it? like nitrate?
 
Actually that is not quite right. Nitrate can be used as an electron acceptor within the respiration chain (instead of oxygen as we do). Alone it does not create any energy of course. The bacterium still requires to get electrons from an electron donor in the first place. A simple electron donor would be acetate, for instance.
This of, course only under the assumption that we talk about energy conservation and not active growth.
 
so what actually in essence creates the energy that an organelle could use for motion in the cell, is it the actual breakdown of organic molecules, sorry for all the questions I am just not understanding.
 

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