Final answer:
A tRNA with an AGC anticodon could attach to a UCG mRNA codon following the base pairing rules of the genetic code.
Step-by-step explanation:
If a tRNA had an AGC anticodon, it would pair with the complementary mRNA codon. Since tRNA anticodons pair with mRNA codons through base pairing rules where adenine (A) pairs with uracil (U) and guanine (G) pairs with cytosine (C), an AGC anticodon on tRNA would pair with a UCG codon on mRNA. Therefore, the tRNA with an AGC anticodon could attach to a UCG mRNA codon.
To answer the student's question directly: If a tRNA had an AGC anticodon, it could attach to a UCG mRNA codon. This is in accordance with the genetic code and the rules of base pairing. The tRNA molecule translates the language of RNA into the language of proteins, ensuring that the correct amino acid is brought to the growing polypeptide chain during protein synthesis.