A tRNA with the anticodon sequence 5′ IUA 3′ will not normally exist because
A)5′ UAA 3′ is a stop codon.
B)I is not a base present in tRNAs.
C)it will recognize codons for different amino acids.
D)5′ UAU 3′ and 5′ UAC 3′ both specify tyrosine.

Question

Quizplus · Accepted Answer

The anticodon sequence 5′ IUA 3′ corresponds to the codon 5′ UAA 3′ on mRNA, which is a stop codon. Stop codons do not code for amino acids and thus do not have corresponding tRNAs.

A TRNA with the Anticodon Sequence 5′ IUA 3′ Will