1. The number 1,2 and 3 are the nucleotides of the anticodon for the mRNA codon 5' AUG 3'. Thus in order of 1, 2 and 3 the sequence of this anitocodon is......
a. UTG
b. ATG
c. GUA
d. CAU
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To determine the anticodon sequence for the given mRNA codon, we need to understand how the pairing of nucleotides occurs for DNA and RNA. In DNA and RNA, there are four nucleotides: adenine (A), thymine (T) (in DNA) or uracil (U) (in RNA), cytosine (C), and guanine (G).
The mRNA codon 5' AUG 3' consists of the nucleotides A, U, and G in that order. The anticodon, located on the tRNA, is the complementary sequence to the mRNA codon. This means that for an AUG codon, the anticodon would be UAC in order to form the base pairings (A-U and G-C).
Given the options:
a. UTG
b. ATG
c. GUA
d. CAU
We can see that option c. GUA is the correct answer since the sequence GUA is the exact complementary sequence to the mRNA codon AUG.