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  4. If the base sequence of a codon in mRNA is 5'-AUG-3', the sequence of tRNA pairing with it must be

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Q. If the base sequence of a codon in $mRNA$ is $5'-AUG-3'$, the sequence of $tRNA$ pairing with it must be

Molecular Basis of Inheritance

Solution:

The first base of anticodon in $5' - 3'$ direction binds with the third base in codon (reading in $5' - 3'$ direction). Thus, if the base sequence in codon of $mRNA$ is $5 - AUG - 3'$, the complementary anticodon will be $3 - UAC-5'$ or $5'-CAU-3'$.