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Author Topic: Are bacteria considered alive?  (Read 11034 times)

George Pope

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Are bacteria considered alive?
« on: 01/10/2010 19:30:03 »
George Pope  asked the Naked Scientists:
   
Are bacteria like  H. pylori considered alive or dead, based on the characteristics of life?

George ( A high school student)        

What do you think?
« Last Edit: 01/10/2010 19:30:03 by _system »


 

Offline Bored chemist

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Are bacteria considered alive?
« Reply #1 on: 02/10/2010 17:11:41 »
What definition of "alive" are you using?
 

Offline chris

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Are bacteria considered alive?
« Reply #2 on: 02/10/2010 22:35:11 »
Yes, bacteria are considered "alive". They are autonomously replicating and free-living, independent of other life-forms. They consume substrates acquired from the environment which they metabolise to produce energy and the synthesise new proteins. To my mind, they fulfil the definition of "alive".

Chris
 

Offline tangoblue

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Are bacteria considered alive?
« Reply #3 on: 15/10/2010 00:17:35 »
I personally think cells are amazing. whats even more amazing is how much goes on inside a cell: respiration, protein synthesis, dna replication.... I totally agree with chris they basically define life. heck they can even commit a kind of suicide (apoptosis)
 

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Are bacteria considered alive?
« Reply #3 on: 15/10/2010 00:17:35 »

 

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