What is the nucleotide sequence of the mRNA codon? Help!?

Question

The nucleotide sequence of a DNA codon is AGT. A messenger RNA molecule with a complementary codon is transcribed from the DNA. In the process of protein synthesis in the ribosome (translation), a tRNA pairs with the mRNA codon.
a) What is the nucleotide sequence of the mRNA codon?
b) What is the nucleotide sequence of the tRNA anticodon?
c) What is the Amino Acid carried by this tRNA?
d) What is the simplest mutation(s) that would turn the original DNA codon to a stop
codon?
Thanks!

Answer 1

a) These would be the complimentary Codons (A goes with T, G goes with C), I think (with T being changed to U). The mRNA codon would be UCA then.

b) This changes back to the original DNA sequence with T changing to U (just remember that T does not exist in RNA, rather it is called U - they're different things completely, but just consider it a name change). AGU.

c) Look at a codon chart using the mRNA codon info, tRNA does not give an amino acid in itself. This would be Serine.

d) There is a UAA stop codon, so you would need your C from UCA to change to an A. Going backwards to what it would be in the DNA, the complimentary DNA codon is T. The G in your DNA nucleotide sequence would have to change to a T.

Answer 2

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RE:

What is the nucleotide sequence of the mRNA codon? Help!?

The nucleotide sequence of a DNA codon is AGT. A messenger RNA molecule with a complementary codon is transcribed from the DNA. In the process of protein synthesis in the ribosome (translation), a tRNA pairs with the mRNA codon.

a) What is the nucleotide sequence of the mRNA codon?

b) What is the...

Answer 3

3

Answer 4

DNA = AGT

mRNA = UCA

tRNA = AGU

amino acid = serine



stop codons are UAA, UGA, UAG

to get tRNA.....UAA.....UGA......UAG

mRNA............AUU.....ACU......AUC

DNA...............TAA......TGA......TAG

mutation could be frame shift from AGT to TAG which would mean the removal of a nucleotide just prior to the AG