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protiens

Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.

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protiens

Postby 2468 » Tue Dec 04, 2012 1:11 am

1)main roles of the following post-translation modifications of proteins: match the following
a)Phosphorylaton --------- 1)Association with membrane
b)Glycosidation ----------- 2)Cell-cell recognition
c)Acylation ------ ---- 3)Degradation
d)Ubiquitinatio -------- 4)Activation/inactivation

2) One of the advantages of expressing eukaryotic proteins in bacteria is that they are faithfully post-translationaly modified.
True or False.

3)The structure and mechanism of action of chaperon proteins are conserved between prokaryotes and eukaryotes
True or False.

4)According to the Crick's wobble hypothesis what bases on the anticodon's 1st position can bind to the codon 3rd position?match the following:
a)C ------------ 1)U,C or A
b)A ------------- 2)G
c)U ------------ 3)C or U
d)G ------------ 4)U
e) I ------------ 5)A or G


5) Lac operon= Imagine that in a e.coli culture that was growing with glucose as its nutrient source you could artificially increase cAMP levels (which are normally associated with starvation). What would happen to the expression of beta-galactosidase?

1. It would be activated because the cAMP binding protein CAP would bind to the beta-galactosidase promoter
2. It would be reduced
3. It would remain at the same relatively high level
4. It would remain at a very low level

I'd appreciate any help!

Thank you :D
2468
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Postby JackBean » Tue Dec 04, 2012 9:27 am

really? Those are pretty easy question and you should be able to answer them. In worst case after looking at Wikipedia.
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.
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