Biology: DNA - RNA Questions Using Amino Acid Circle
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Biology: DNA - RNA Questions Using Amino Acid Circle

[From: ] [author: ] [Date: 13-03-22] [Hit: ]
aminocodes.#1.#5.#6.#7.So can somebody help?......
I have absolutely no idea what I am supposed to do. Can someone help?
Here is a link to an Amino Acid Circle if that helps: http://www.aminocodes.com/images/SCI_Ami…
And here is a correct example:

DNA Sequence A G C T T A C T G T G G
mRNA Sequence U C G A A U G A C A C C
tRNA Sequence A G C U A A C U C U G G
AA Sequence Serine - Asparagine - Glycine - Threonine

#1.
DNA Sequence A T G C A T G T T A T C
mRNA Sequence
tRNA Sequence
AA Sequence

#2
DNA Sequence C G C G T C A T G T A C
mRNA Sequence
tRNA Sequence
AA Sequence

#3
DNA Sequence G G C A T T A C G A C T
mRNA Sequence
tRNA Sequence
AA Sequence

#4
DNA Sequence A A C G T A A C C C G T
mRNA Sequence
tRNA Sequence
AA Sequence

#5.
DNA Sequence T A T G A G C A T C A G
mRNA Sequence
tRNA Sequence
AA Sequence

#6.
DNA Sequence A G A G C A T T A T G A
mRNA Sequence
tRNA Sequence
AA Sequence

#7. DNA Sequence C A T T A T C G T A C A
mRNA Sequence
tRNA Sequence
AA Sequence

So can somebody help? Or maybe explain this to me?

-
Okay so DNA has the 4 base pairs Thymine, Adenine and Cytosine Guanine. Normally Thymine and Adenine match up and Cytosine and Guanine would match up...

but in mRNA Thymine is replaced with Urasil so for example in question 1 you have
ATG CAT GTT ATC, it would then become UAC GUA CAA UAG

You would then match up the base pairs again for tRNA, again remembering there is no Thymine for RNA.
UAC GUA CAA UAG becomes AUG CAU GUU AUC.

Don't be scared! Using this circle is really easy even though it looks intimidating.

First look at the first letter of each triplet codon.
ex: AUG - begins with A so look at the circle and find the big A in the middle. Just focus on that quarter of the circle now.

Then next letter is U so now look at only the U portion. Since the last letter of the codon is G, it means that sequence codes for Methionine.

If you look at the portion beside methionine you will notice Isoleucine has A,U, and C. That is because there are lots of different ways these letters can be arranged but there are only 20 amino acids so that's why certain combinations will produce the same amino acid. (AUA, AUC, AUG all code for Isoleucine)

So then next is CAU, first look at the big C then find A, then find U and you will see that it codes for Histidine.

Be VERY careful when you are translating DNA to mRNA to tRNA! If you accidentally coded it wrong you could get the wrong amino acid!

Good luck!
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