Ask A Scientist© Molecular Biology Archive

 >   name        fio
 >   status      student
 >   age         15

 >   Question - Why are peptone and beef extract needed in culture mediums?
 >what procedures are done in the culture of lactobacilli


>There are two types of media for the growth of organisms.  One is called
>defined media; this is when every ingredient in the media is known in the
>exact proportions.  This is kind of like using a recipe with all the
>ingredients measured out exactly.  The second kind is called complete media.
>This is where although the exact proportions are not known, it seems to
>provide everything the bacteria need because they grow vigorously on it
>whenever it is used.  Peptone and beef extract are known to be very
>nutritious to bacteria and most types of bacteria grow very well on it.
>
>vanhoeck

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