Lac operon

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Lac operon

Post by georgina_009 on Wed May 07, 2008 9:29 am

Sorry again for the millions of qns but Im doing quite badly in this subject so I need loads of help!
Could you just check my answer for this qn?

A lacI mutation leads to repressor not able to bind to operator at 42 degrees. At 37 deg. the lacI repressor is same as wild type. Do you expect to see B-galactosidase activity under these conditions?:

a) LacI - 37 deg - lactose absent - activity - (my answer) no
b)LacI - 37deg - lac present - activity yes
C) lacI - 42 deg. - lac absent - act. yes
d) lacI - 42 - present - yes
e) wild type (wt) - 37deg - absent - act. no
f) wt - 37 - present - yes
g) wt - 42 deg. - absent - no
h) wt - 42 - present - yes

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Re: Lac operon

Post by Alla on Thu May 08, 2008 3:12 am

All questions are answered correctly.

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Re: Lac operon

Post by georgina_009 on Thu May 08, 2008 7:13 am

Thanks

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Re: Lac operon

Post by Alla on Thu May 08, 2008 11:38 pm

You are welcome!

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