What does DNA code for?

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starlet7000
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What does DNA code for?

Post by starlet7000 » Tue Oct 25, 2005 9:59 am

Does DNA code for mRNA. tRNA and rRNA?

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mith
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Post by mith » Tue Oct 25, 2005 12:51 pm

Do you know what DNA does in addition to storage of genetic info?
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Post by starlet7000 » Tue Oct 25, 2005 2:07 pm

codes for proteins

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Post by bluey_3 » Tue Oct 25, 2005 2:09 pm

i'm not replying. but just thinking whether it is correct or not.

DNA carries all the genes and after extracting out by using mRNA and with tRNA, like enzymes, proteins are being built. Is it?? if I'm wrong please correct me.

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Post by starlet7000 » Tue Oct 25, 2005 2:18 pm

I don't think mRNA or tRNA are not enzymes. mRNA is a singled stranded molecule that serves a s a template of protein sysnthesis. The enzyme used to unwind DNA in DNA helicase. Thanks for your help bluey_3.

Though what i don't get is does DNA only serve as a template strand for the synthesis of mRNA?

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Post by Terry K. » Tue Oct 25, 2005 2:29 pm

It should, because if you think about it, Which came first, DNA or RNA. OF COURSE RNA, DNA is used as a template for which all forms of RNA are sythesized!!! :roll:
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Post by canalon » Tue Oct 25, 2005 3:30 pm

Yup,
tRNA and ribosomal RNA are coded in the DNA. As well as mRNA which after translation in ribosomes (made of RNA and proteins) with use of amino-acyl tRNA will make the protein.

:idea: But you should give a look to a basic biology book, this is usually explained in the very first chapters :twisted:

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Post by Terry K. » Tue Oct 25, 2005 8:57 pm

I thought I was right, 99% of me was sure, but that 1% is always there, and it usually makes me get a B on Biology tests, yep, I'm paranoid like that!
Saying that any two humans are exactly alike is like saying republicans have morals

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Post by baikuza » Wed Oct 26, 2005 9:59 am

hm! Hm!!
yeah.. DNA transcript use RNA. even in the replication. i think RNA is not an enzyme.. if it was i think it's the most tiny enzyme in the world.
at the replication processes there are others enzymes involve. they are DNA polymerase and ligase.... (i just said what i know so if i wrong correct me)

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Post by victor » Wed Oct 26, 2005 12:31 pm

Of course RNA is not an enzyme....do you see -ase suffix at the back of RNA word?? :D
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canalon
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Post by canalon » Wed Oct 26, 2005 1:33 pm

victor wrote:Of course RNA is not an enzyme....do you see -ase suffix at the back of RNA word?? :D


Well if you search the internet for "ribozyme" you will find that RNA can have a catlytic activity. That is indeed what makes the RNA world hypothesis possible.
And do not forget that ribosomes are made up of a good amount of RNA too, and it's not there only for structural purpose.

[OOOPPS edited! RNA in ribosome Is NOT onnoly for structure... :oops: ]
Last edited by canalon on Wed Oct 26, 2005 7:05 pm, edited 1 time in total.
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Post by donkeyknog » Wed Oct 26, 2005 6:51 pm

I was gonna ask the same thing but now I dont have to.

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