To solve this, we need to understand the relationship between codons and amino acids. Codons are sequences of three nucleotides in mRNA that correspond to specific amino acids or stop signals during protein synthesis.
Here, we have a mutation where the codon AUA has changed to AUU. We need to determine the impact of this mutation using the given table of amino acids and their corresponding DNA codes.
Firstly, we need to recognize that mRNA codons are often related to DNA via complementary base pairing. In the RNA, adenine (A) pairs with uracil (U), and cytosine (C) pairs with guanine (G). However, to keep things simpler, we directly look at codons in mRNA:
1. Identify the Impact of Mutation:
- Original codon: AUA
- Mutated codon: AUU
To find the corresponding amino acid, we usually reference a standard codon table for mRNA:
```
Codon Amino Acid
AUA Isoleucine (Ile)
AUU Isoleucine (Ile)
```
Both the original codon (AUA) and the mutated codon (AUU) code for the same amino acid, Isoleucine. Therefore, this mutation does not change the amino acid coded by the sequence. The protein sequence remains unchanged because both codons specify the same amino acid.
2. Confirm with the Given Table (DNA to Amino Acid):
Given:
[tex]\[
\begin{array}{|l|l|}
\hline
AMINO ACID & DNA CODE \\
\hline
Isoleucine & TAA \\
Isoleucine & TAT \\
Glycine & CCT \\
Arginine & TCT \\
\hline
\end{array}
\][/tex]
From the table:
- Isoleucine (Amino Acid) corresponds to DNA codes TAA and TAT.
In the RNA, these would correspond back to mRNA codons AUA and AUU, which both code for Isoleucine.
3. Conclusion:
The mutation caused the codon AUA to change to AUU, but both codons still correspond to the amino acid Isoleucine. Thus, the mutation does not change the amino acid type.
Therefore:
The mutation did not change the amino acid type; it is still Isoleucine.
