During translation, the type of amino acid that is added to the growing polypeptide depends on the

a
codon on the mRNA and the anticodon on the tRNA to which the amino acid is attached.
b
anticodon on the tRNA to which the amino acid is attached only.
c
anticodon on the mRNA only.
d
codon on the mRNA only.

a. codon on the mRNA and the anticodon on the tRNA to which the amino acid is attached.

During translation, the ribosome reads the codons on the mRNA, and the corresponding tRNA molecules with their attached specific amino acids are brought into the correct position based on their anticodon sequences. Each tRNA anticodon is complementary to a codon on the mRNA, ensuring that the appropriate amino acid is added to the growing polypeptide according to the genetic information encoded in the mRNA.