AP Biologyeasymcq1 pt
An mRNA codon is written 5′-AUG-3′. Which tRNA anticodon, written 3′→5′, pairs with it?
A.3′-AUG-5′
B.3′-TAC-5′
C.3′-CAU-5′
D.3′-UAC-5′
Explanation
Core Concept
Codon–anticodon pairing is complementary and antiparallel. Thus mRNA 5′-AUG-3′ pairs with tRNA anticodon 3′-UAC-5′; if the anticodon were instead written 5′→3′, it would be 5′-CAU-3′.
Correct Answer
D3′-UAC-5′
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