E.coli replication time

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shafaqb
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E.coli replication time

Post by shafaqb » Fri Mar 09, 2007 7:13 am

In E. coli, It takes 40 min to replicate the entire
chromosome
It requires 20 min between the DNA
replication and cell division.

How can the generation time in E.coli is 20 min?

Jelanen
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Post by Jelanen » Fri Mar 09, 2007 11:13 pm

Not all E. coli strains replicate at 20mins. Lab strains that have been passed too many times or strains like DH5a that are fairly stripped down will have shorter generation times. Or so I've heard.... 8)
'It is futile to pretend to the public that we understand how an amoeba evolved into a man, when we cannot tell our students how a human egg produces a skin cell or a brain cell!'

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canalon
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Post by canalon » Sat Mar 10, 2007 4:16 am

Well lab strains might have lost some of their genome (K12 the reference lab strain has a genome about 20% smaller than O17:h7 a pathogen) but both those numbers are true for a laboratory starin.

So, Hint:

The first division will take 40 minutes, the next one will only take 20 minutes.
Patrick

Science has proof without any certainty. Creationists have certainty without
any proof. (Ashley Montague)

Jelanen
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Post by Jelanen » Sun Mar 11, 2007 6:40 pm

Ohhh, yeah...forgot about that little tidbit when I threw out my first answer. You bacteria people and your tricksy pets.....
'It is futile to pretend to the public that we understand how an amoeba evolved into a man, when we cannot tell our students how a human egg produces a skin cell or a brain cell!'

Dr Jérôme J. Lejeune

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Re: E.coli replication time

Post by dayghost » Mon Jul 20, 2009 11:04 am

for the answer refer book " molecular genetics of bacteria 4th edition by jeremy dale and simon park" page no 16-19.

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