Question
A segment of DNA was mutated due to exposure to radiation. The original and mutated mRNA sequences are
shown:
Original mRNA sequence: UUC UCG AAU GAG UCG
Mutated mRNA sequence: UUC UCG AAU GAG UGG
What type of mutation occurred as a result to exposure to radiation?
Select all correct options
Substitution
Deletion
Evolution
Insertion
shown:
Original mRNA sequence: UUC UCG AAU GAG UCG
Mutated mRNA sequence: UUC UCG AAU GAG UGG
What type of mutation occurred as a result to exposure to radiation?
Select all correct options
Substitution
Deletion
Evolution
Insertion
Answers
GPT-4o mini
The original mRNA sequence is: **UUC UCG AAU GAG UCG**
The mutated mRNA sequence is: **UUC UCG AAU GAG UGG**
To determine the type of mutation, let's compare the sequences:
- The first part of the sequence (UUC UCG AAU GAG) is the same in both the original and mutated mRNA sequences.
- The only change occurs in the last codon: the original "UCG" has been mutated to "UGG."
This represents a change in a single nucleotide, which is characteristic of a **substitution mutation**.
Here are the options evaluated:
- **Substitution**: **Correct** - This is the correct type of mutation since one nucleotide (the last codon) has been substituted for another.
- **Deletion**: **Incorrect** - No nucleotides have been deleted in this case.
- **Evolution**: **Incorrect** - While mutations can contribute to evolution over time, this term is not applicable in the context of describing a specific mutation type.
- **Insertion**: **Incorrect** - There is no additional nucleotide inserted into the sequence.
In conclusion, the correct option is **Substitution**.
The mutated mRNA sequence is: **UUC UCG AAU GAG UGG**
To determine the type of mutation, let's compare the sequences:
- The first part of the sequence (UUC UCG AAU GAG) is the same in both the original and mutated mRNA sequences.
- The only change occurs in the last codon: the original "UCG" has been mutated to "UGG."
This represents a change in a single nucleotide, which is characteristic of a **substitution mutation**.
Here are the options evaluated:
- **Substitution**: **Correct** - This is the correct type of mutation since one nucleotide (the last codon) has been substituted for another.
- **Deletion**: **Incorrect** - No nucleotides have been deleted in this case.
- **Evolution**: **Incorrect** - While mutations can contribute to evolution over time, this term is not applicable in the context of describing a specific mutation type.
- **Insertion**: **Incorrect** - There is no additional nucleotide inserted into the sequence.
In conclusion, the correct option is **Substitution**.