Considering the mRNA sequence of the insecticide-resistant fruit flies, the corresponding sequence of nucleotides on the individual's DNA is:
- AGA - VCE - SSCE Biology - Question 22 - 2014 - Paper 1
Question 22
Considering the mRNA sequence of the insecticide-resistant fruit flies, the corresponding sequence of nucleotides on the individual's DNA is:
- AGA.
- AUA.
- CGA.
-... show full transcript
Worked Solution & Example Answer:Considering the mRNA sequence of the insecticide-resistant fruit flies, the corresponding sequence of nucleotides on the individual's DNA is:
- AGA - VCE - SSCE Biology - Question 22 - 2014 - Paper 1
Step 1
Identify the mRNA sequence
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Answer
The mRNA sequence provided consists of the following codons: AGA, AUA, CGA, and TGT.
Step 2
Translate mRNA to DNA
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Answer
To find the corresponding DNA sequence, we must convert the mRNA codons to their DNA counterparts. The base pairing is as follows:
Adenine (A) pairs with Thymine (T)
Uracil (U) pairs with Adenine (A)
Cytosine (C) pairs with Guanine (G)
Guanine (G) pairs with Cytosine (C)
Using this template:
For AGA in mRNA, the corresponding DNA codon is TCT.
For AUA in mRNA, the corresponding DNA codon is TAT.
For CGA in mRNA, the corresponding DNA codon is GCT.
For TGT in mRNA, the corresponding DNA codon is ACA.
Step 3
Final DNA sequence
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Answer
Combining these, the sequence of nucleotides on the individual's DNA corresponding to the mRNA is: