If anyone knows the difference between..

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Posted by Nrg2Nfinit on Nov-08-2005 03:31:

quote:
Originally posted by UWM
Biochemistry and Molecular Biology

shit msn now

Posted by prolikewhoa on Nov-08-2005 03:31:

quote:
Originally posted by Estella
My brain just short circuited.

where the hell have you been lady?

Posted by Nrg2Nfinit on Nov-08-2005 03:31:

quote:
Originally posted by wizniz
LAMEST THREAD OVER AND IT ENDS....

nnnnn

nnnnnnnnnoooo

NOW.

if you have nothing nice to say then shove it enrique

Posted by Flyboy217 on Nov-08-2005 04:13:

Re: Re: Re: If anyone knows the difference between..

quote:
Originally posted by Nrg2Nfinit
of course since its basically doing replication and helicase is acting as a seperate unit, less complex activity involved. i think that makes sense?

Not quite. As you're probably aware, enzymes (and indeed many proteins) are constructed out of separate domains, which have different purposes (act as different active sites, form different structures, etc.).

Most organisms have more than one type of both RNA and DNA polymerase, each of which may have different active sites. Some of these contain exonucleases, which exist in both 3'->5' and 5'->3' variants. 3'->5' exonucleases are responsible for proofreading, and are more commonly found in DNA polymerases.

This may not be essential material for your class, but I've often found that attempting to learn things in greater depth makes the basic material stick much better. In any case, hope I've helped.

Posted by Vlad on Nov-08-2005 04:29:

Since Im taking genetics now, here you go...

Posted by Nsonic on Nov-08-2005 05:31:

Re: If anyone knows the difference between..

quote:
Originally posted by Nrg2Nfinit
transcription in protein synthesis and in DNA replicatin please answer..

i need to know if helicase is involved in protein sythesis for the unwinding of DNA.

just had my bio exam
and now im starting to forget stuff, so..from memory

transcription and dna replication both happen in the nucleus
transcription uses only one dna strand (sense strand)
dna replication uses both as a template.

in transcription, the dna isnt altered, but a new RNA strand is synthesized (RNA, so theres no thymine) (enzyme: rna polymerase)

in replication, the original dna molecule splits (hydrogen bonds are broken), and each strand is used as a template to synthesise the new strand (with the help of..dna polymerase) and in each of the two new dna double helixes, one of the strands is from the original.

to answer the question about helicase...

....i cant remember what they do :P
did this stuff earlier in the year and the biology course is over so pssh

Posted by Vlad on Nov-08-2005 05:33:

Well, if you dont know what the helicase does, than maybe you should read the part about unwinding the double helix in the picture of my genetics text book that I posted.

Posted by Nsonic on Nov-08-2005 05:37:

quote:
Originally posted by Vlad
Well, if you dont know what the helicase does, than maybe you should read the part about unwinding the double helix in the picture of my genetics text book that I posted.

not a big fan of reading, and its Nrg2Nfinit that needs to be reading it anyway :P

wow, someone actually dared to ask for help in the CORe

Posted by Dmatrox on Nov-08-2005 06:13:

hello, use google?

Posted by Nrg2Nfinit on Nov-08-2005 07:47:

quote:
Originally posted by Dmatrox
hello, use google?

lol you guys are more responsive then any search engine

thanks for the help..

Posted by Nrg2Nfinit on Nov-08-2005 07:52:

Re: Re: Re: Re: If anyone knows the difference between..

quote:
Originally posted by Flyboy217

Most organisms have more than one type of both RNA and DNA polymerase, each of which may have different active sites. Some of these contain exonucleases, which exist in both 3'->5' and 5'->3' variants. 3'->5' exonucleases are responsible for proofreading, and are more commonly found in DNA polymerases.

this makes sense.. otherwise we would be all getting genetic disorders at a much higher rate.. i forgot about proof reading

ill have to learn more on that.. if you have any more information plz post

Posted by Nrg2Nfinit on Nov-08-2005 07:52:

Posted by Vlad on Nov-08-2005 07:57:

quote:
Originally posted by Nrg2Nfinit
thnx vlad that was a good read

Congradulations, you have officially read more of my textbok than I have.

Posted by Nrg2Nfinit on Nov-08-2005 08:01:

quote:
Originally posted by Vlad
Congradulations, you have officially read more of my textbok than I have.

LOL

Posted by Nrg2Nfinit on Nov-08-2005 22:15:

again thanks alot doods.. my midterm went alright this looks promising.. i might actually get a university degree

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