MadSci Network: Microbiology

Subject: Why doesn't yogurt reproduce like other bacteria?

Date: Tue Jan 17 23:01:37 2006
Posted by Stephanie
Grade level: undergrad School: Iowa State University
City: Ames State/Province: Iowa Country: USA
Area of science: Microbiology
ID: 1137564097.Mi

Hi! My name is Stephanie and I'm a sophomore zoology major at Iowa State 
University. In my molecular biology class we learned that bacteria (as well as 
other prokaryotes) reproduce at a rate of about 1 cycle per 20 minutes. That's 
a lot of bacteria that could be reproduced in a very short amount of time. It 
then crossed my mind that yogurt is composed of bacteria. Why is it that a cup 
of yogurt doesn't turn into 100 cups of yogurt after a very short while? Is 
there some component that prevents it from reproducing?
Thanks for your help!

Re: Why doesn't yogurt reproduce like other bacteria?

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