AP Biologyeasymcq1 pt
The codon UUU codes for phenylalanine in bacteria, plants, and humans. This illustrates that the genetic code is
A.nearly universal
B.random
C.species-specific
D.only valid in eukaryotes
Explanation
Core Concept
The same codon assignments are used by nearly all organisms, with a small number of known exceptions. This near-universality of the genetic code is powerful evidence of common ancestry. The current AP Biology framework itself uses the wording 'nearly all living organisms use the same genetic code.'
Correct Answer
Anearly universal
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