The base sequences of a short section of DNA are shown, together with mRNA that has beentranscribed from it and one of the tRNA anticodons that could be used to translate the mRNA.DNA strand 1 A-C-G-G-C-A-T-T-A-G-C-T-A tRNA anticodon U-U-ADNA strand 2 T-G-C-C-G-T-A-A-T-C-G-A-T mRNA U-G-C-C-G-U-A-A-U-C-G-A-UWhich strand of DNA is transcribed and to which codon in the mRNA would the tRNA anticodonbind during translation?DNA strand transcribed mRNA codon thattRNA anticodon binds toA. DNA strand 1 secondB. DNA strand 2 secondC. DNA strand 1 thirdD. DNA strand 2 third
Question
The base sequences of a short section of DNA are shown, together with mRNA that has beentranscribed from it and one of the tRNA anticodons that could be used to translate the mRNA.DNA strand 1 A-C-G-G-C-A-T-T-A-G-C-T-A tRNA anticodon U-U-ADNA strand 2 T-G-C-C-G-T-A-A-T-C-G-A-T mRNA U-G-C-C-G-U-A-A-U-C-G-A-UWhich strand of DNA is transcribed and to which codon in the mRNA would the tRNA anticodonbind during translation?DNA strand transcribed mRNA codon thattRNA anticodon binds toA. DNA strand 1 secondB. DNA strand 2 secondC. DNA strand 1 thirdD. DNA strand 2 third
Solution
The DNA strand that is transcribed is DNA strand 2. This is because the mRNA sequence matches the base pairing rules with DNA strand 2 (A-U, T-A, C-G, G-C).
The tRNA anticodon U-U-A would bind to the mRNA codon A-A-U. This is the second codon in the mRNA sequence.
So, the correct answer is B. DNA strand 2 second.
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