AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

STRUCTURE OF NUCLEIC ACIDS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If mRNA has a codon CAU, what is the corresponding anticodon on the tRNA molecule?
A
CAT
B
GUA
C
CAU
D
GTA
Explanation: 

Detailed explanation-1: -The anticodon of L. plantarum tRNAIle2(CAU) is modified by TilS. In most eubacteria, the anticodon of tRNAIle2(CAU) is modified by TilS after transcription. The L modification of the anticodon loop is required for recognition by IleRS and for decoding of AUA codon (16).

Detailed explanation-2: -For instance, a messenger RNA codon GCA matches with the transfer RNA with the anticodon CGU, which carries with it the amino acid called alanine.

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