Textbook Question
For each of the following tRNA anticodon sequences, give the sequence of the corresponding codon sequence, the amino acid carried by the tRNA, and the corresponding DNA coding strand sequence and polarity.
3′-CCU-5′
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11. Translation
Transfer RNA
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How many tRNA nucleotides form an anticodon that pairs with an mRNA codon during translation?
A
3
B
1
C
4
D
2
Verified step by step guidance1
Recall that during translation, the mRNA codon is a sequence of three nucleotides that codes for a specific amino acid.
Understand that the tRNA molecule has a complementary sequence called the anticodon, which pairs with the mRNA codon to ensure the correct amino acid is added to the growing polypeptide chain.
Recognize that the anticodon must be complementary and antiparallel to the mRNA codon, meaning it also consists of three nucleotides.
Therefore, the number of nucleotides in the tRNA anticodon that pair with the mRNA codon is equal to the number of nucleotides in the codon, which is three.
Summarize that the anticodon is a triplet of nucleotides on the tRNA that specifically pairs with the three-nucleotide codon on the mRNA during translation.
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