posted by .

I have been given a DNA nucleotide sequence and have established the equivalent mRNA sequence.I have then been given 2 mutations and I have worked out the new mRNA sequence but I have to suggest why it may change the function of the new protein. The new sequence is AUA AGC UUU, and I know that the start codon is always AUG, but I'm not sure how it would change the function of the protein? Any help would be appreciated!

I thnk the answer would be that this mRNA would not be translated into a polypeptide chain?

Further on in the question it states that the mutation found is the change to produce the dominant gene for continued lacatse production throughout adult life. However, if AUG is always the start codon, the how would the new sequence be possible? If it's not translated into a polypeptide chain then what is it? I think I have missed something vital here!

I've come up with: Ile,Ser, Phe. Can this be done? if so how does it change the function of the protein?

I got the same. It says in bk 9 that a mutation in the DNA code can be transcribed into mRNA and subsequently translated into a protein on p130. It's also got some info on p127. I'm not too sure why it may change the function. I'm guessing the code is right, but if it's not a polypeptide chain then I don't know what it is! Great way to spend the easter holidays.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. Biology

    The human gene for the production of lactose is on chromosome 2. The dna nucleotide sequence of a small part from the middle is 123456789 TACTCGGAA I haVeTO WRITe DOWN THE EQVIVALENT SEQUENCE FOR MRNA AND HENCE WORK out the sequence …
  2. Biology

    A mutation of c to t in position 3 and another of G to A in position 7 results in the production of a different sequence of ammino acids work out the new sequence and suggest why it might change the function of the new protein I get …
  3. Biology

    pair up your nucleoide sequence with the mRNA sequence then you will find from the amino acids in the codons what amino acids are present in the lactase production. Each dna sequence coincincids with the appropriate mRNA sequence unless …
  4. biology

    DNA codes for mRNA, which is then translated into polypeptides,which are strands of amino acids. The DNA sequence below codes for the following amino acids: methionine-valine-glycine-alanine-alanine-serine TAC CAA CCA CGC CGC UCA What …
  5. Biology

    You are given the following protein sequence: NH2-Met-Trp-Trp-Met-Trp-Met-COOH What was the sequence of the mRNA?
  6. biology

    6) If the DNA sequence is GTAC, what will be the mRNA sequence?
  7. Science

    The following DNA sequence represents a eukaryotic gene. Indicate which is the template and which is the coding strand, determine where transcription begins (assume it ends at the end of the sequence presented), write out the nucleotide …
  8. biology help plz?????????????????

    the mRNA squence below is shown along with the polypeptide which would be produced when it is translated .what polypeptide would be produced if the fifth base in the mRNA sequence shown had been changed to A as result of a mutation …
  9. Biology

    Does it matter which strand is the 'code strand'?
  10. sciencec

    51. A fragment of mRNA with the sequence 5' ACGCAUGGCAAAAAAAA 3' will have a template DNA sequence that reads A. 3' UGCGUACCGUUUUUUUU 5'. B. 3' TTTTTTTTGCCATGCGT 5'. C. 3' UUUUUUUUGCCATGCGT 5'. D. 3' TGCGTACCGTTTTTTTT 5'

More Similar Questions