Chem question... Please help.

[EternityOfPain]

I am having trouble answering the following question any help would be greatly apperciated.

1. A protein must be synthesized by a cell. Part of the amino acid sequence in this protein is:


-Ala-Gly-Thr-Leu-

The codons for these amino acids are:
Gly -- G G C
Leu -- C U A
Thr -- U A U
Ala -- G C A

Write the base sequence for the complete chain as given and the complimentary bases as would be found in the DNA from which it was taken.

I am completely confused on how to appoarch this problem...

It said the whole sequence however only part is given. So what I am assumping it is G C A G G C U A U C U A? But as far as complimentary bases I am at a lost. Any help would be great. Thanks.

[Caine]

since this deals with DNA, its as much Bio as Chem. I don't remember how to do this. What level you are studying at would also probably be fairly helpful, but I understand not giving out such info

[EternityOfPain]

since this deals with DNA, its as much Bio as Chem. I don't remember how to do this. What level you are studying at would also probably be fairly helpful, but I understand not giving out such info


Oh its not a problem. I am currently in college and this is the entry course for chem.

[HitokiriShadow]

Your book should show the complementary bases somewhere. I don't remember what they were, as I only took high school chemistry and I am avoiding it in college.

The end result would look somthing like this:

G - ?
C - ?
A - ?
G - ?
G - ?
C - ?
U - ?
A - ?
U - ?
C - ?
U - ?
A - ?

The ? would be the applicable complematary bases. Wikipedia info on base pairing (http://en.wikipedia.org/wiki/DNA#Base_pairing)

[Takumi Fujiwara]

I believe that HitokiriShadow is correct, it's been a long time since I took a chem class that covered DNA, the last one was probably advanced chem in high school. I've taken quite a few chem classes in college (since I'm a chem major), but it's been awhile since I took one that covered DNA.

[Miss Nikki]

I took this in bio in highschool. But I kept the book. I'll look it up and get back to you.

Nikki

[Scandiadream]

You would need to check your biochemistry book to see which protein starts out like that. I honestly do not recognize it- but I am guessing it is a common one that has been mentioned often. Remember that Uracil is not in DNA, that its correspondent one is Thymine. So just pair T's with the A's and A's with the U's. And of course- C's with G's and G's with C's.

Here is the complementary base sequence with DNA nucleotides:

C
G
T
C
C
G
A
T
A
G
A
T

[Magami No ER]

I did this biochemistry sort of work last year.
I am having trouble answering the following question any help would be greatly apperciated.

1. A protein must be synthesized by a cell. Part of the amino acid sequence in this protein is:


-Ala-Gly-Thr-Leu-

The codons for these amino acids are:
Gly -- G G C
Leu -- C U A
Thr -- U A U
Ala -- G C A

Write the base sequence for the complete chain as given and the complimentary bases as would be found in the DNA from which it was taken.

So I infer from this question that you must find the the DNA bases that complement these RNA ones? (as Uracil is the only deviant name for the nitrogenous base, and it goes with the DNA part Thymine)
Well, in DNA, G-C, and A-T to make a DNA strand complete(I childishly used to memorize this by teh letters shape/ =P), so when you factor in any of the RNA types, it's the same thing. The only difference is that the A-T becomes A-U, that must be kept in mind. So that would make your DNA transfer;

Gly -- C C G
Leu -- G A T
Thr -- A T A
Ala -- C G T

For slow people such as myself, I find turning U into T first off helps speed up the process.^^;


I hope that somewhat was an acceptable answer, your question might have been calling for more. I dunno, I was never in a college level class for any sciences, so I'm not used to the way the question was written. Hence I required inference.

Edit: Whatever works. =P

[EternityOfPain]

Thank you everyone for all your help! It is greatly apperciated. :thumbsup:

[Big Shot]

PV=nRT is as much as I can remember from my college chem class last year, lol