Final answer:
The anticodon for the amino acid Arginine (Arg), given the codon CGU, is ACG. However, since Inosine can pair with C, U, and A, the anticodon is represented as ICG when 'I' stands for Inosine. Therefore, the correct answer is b) 5'-ICG.
Step-by-step explanation:
The question asks for the anticodon that pairs with the codon for the amino acid Arginine (Arg). Codons are sequences of three nucleotides on the mRNA that encode for specific amino acids, and anticodons are the complementary three-nucleotide sequences on tRNA that match up with codons during translation. To find the anticodon for Arg, you need to know the codon for Arg and then find the complementary nucleotides that would pair with it.
Arginine can be coded by several codons; one example is CGU (this is the codon in RNA, for DNA it would be CGT). An anticodon pairs with a codon using complementary base pairing (A with U, and C with G). Therefore, the anticodon that matches the codon CGU would be GCA, but it would be written in the direction that is antiparallel to the codon, which is 5'-ACG-3' to align properly with a codon read as 5'-CGU-3'.
Since letters I and U can sometimes be used interchangeably for Inosine and Uracil in the context of wobble base pairing in tRNA, the correct answer for the anticodon for Arg from the provided options is b) 5'-ICG, assuming 'I' stands for Inosine, which is capable of pairing with C, U, and A in the mRNA codon.