SAT Subject Biology Practice Question 261: Answer and Explanation

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Question: 261

11. A codon on the coding strand of a gene is shown below. Which anticodon sequence will bind to the transcribed codon?


A. 3'-ACU-5'
B. 3'-TGA-5'
C. 3'-UGA-5'
D. 5'-ACU-3'
E. 5'-UGA-3'

Correct Answer: C


The complimentary codon on the template strand of DNA is transcribed to mRNA, resulting in a similar nucleotide sequence (5'-ACU-3'). The complimentary tRNA anticodon that binds to this mRNA sequence is 3'-UGA-5'.

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