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the three molecles in mRNA that specifiesan aminoacid

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the three molecles in mRNA that specifiesan aminoacid

Postby kandarp shah » Mon Jun 06, 2005 5:55 pm

hi guys :(
this is actually my final exam question that i was bit confused
so pl tell me the proper answer

the group of three molecles in mRNA that specifies an amino acid is known as which of the following?

a) translation,
b) codon
c) replication,
d) nucleosome.

thanks a lot to whom ever help me :D
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Postby MrMistery » Mon Jun 06, 2005 7:15 pm

The answer is codon. I don't know why. That is simply the definition of the codon: the group of three molecles in mRNA that specifies an amino acid
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Postby biostudent84 » Mon Jun 13, 2005 5:50 pm

Codons also refer to three bases anywhere. mRNA, DNA, even tRNA are considered to have codons.
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Postby MrMistery » Mon Jun 13, 2005 7:54 pm

Really Kyle? My high-school teacher said that it's a mistake to say DNA has codons. But she has been wrong before
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Postby biostudent84 » Mon Jun 13, 2005 8:05 pm

MrMistery wrote:Really Kyle? My high-school teacher said that it's a mistake to say DNA has codons. But she has been wrong before


It might be a language barrier problem. But over here, it's fine to say that DNA has codons.

Err, no, wait. On second though.......It is a mistake to say that DNA does not have codons! If DNA did not have codons, how else would it be read?
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Postby MrMistery » Tue Jun 14, 2005 7:48 pm

I don't understand... Read DNA as in transcript mRNA? Well, when mRNA is created the whole DNA chain is read, one nucleotide at a time. So why would it require codons?
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Postby Poison » Tue Jun 14, 2005 8:12 pm

As much as I know, DNA has codons.
Actually the definiton of codon is: (taken from our dictionary)
The coding unit of DNA that specifies the function of the corresponding messenger RNA.
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Postby MrMistery » Tue Jun 14, 2005 8:57 pm

Ok, guess i was wrong. I take pride in saying "I was wrong"! Any scientist who can not admit that is not a true scientist. Now i know more than I knew this morning 8)
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Postby kiwi3388 » Tue Jun 14, 2005 9:12 pm

there are codons and anti codons which is how protein synthesis occurs but if im wrong someone tell me because i need to understand this for my A2 course
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Postby MrMistery » Tue Jun 14, 2005 9:20 pm

You are not really wrong but i'm guessing you don't understand the phenomenon very well. We have a tutorial on the site on this, i think. If you have any questions feel free to ask
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